NEW TRENDS AND TOPIC CHANGES OF JBEM 2007–2019: A BIBLIOMETRIC REVIEW

. The Journal of Business Economics and Management (JBEM) has been very active in the field of economics and management science and brought many influential outputs in the last decades. This paper investigated the current status of publications and citations from JBEM and explored the hot topics and new trends represented by most used keywords extracted from the published articles from 2007 to 2019. The data were analyzed and mapped with respect to the most cited literature, most prolific authors, and publication records categorized by authors, institutions and countries. The analysis revealed that papers published each year by the JBEM is relatively stable and published papers has an expected citation number 7.68 times. The difference in frequency of keywords in different stages give us informative clue for future studies. The emerging topics include “SMEs” “Information” “framework” “perspective”, hence the likely focus of JBEM to consider submission of papers centered on these topics, the comparison of keywords between JBEM and Hot Papers & Highly Cited Papers was made as well. Some new trends, for example, information science combining with management science are new hot topics.


Introduction
During the Soviet-era, Lithuania adopted a socialist planned economy. After Lithuania's separation from the Soviet Union in 1990, social liberalization in the post-Soviet period stimulated economic development and economic activity (Statistics Lithuania, 2013). During this period, Lithuania has made significant progress in business practice and business education system, identifying the direction of Lithuanian education and research (Pranulis, 2004). The reveal research collaborations between organisations (Van Raan, 2005), authors, or countries, and evolution of the subjects within a selected field of knowledge (Viebahn & Chappin, 2018;Zhang & Zhou, 2019). Generally, the academic evaluation of a journal starts with judging its impact factor or ranking in its own fields, which can often significantly influence decisions about submission of manuscripts to a particular research publication (Tijssen & Van Raan, 1994). The deeper analysis by bibliometric can provide forthcoming author a comprehensive understanding for the publication (Akmal et al., 2018). There are many different journals released its bibliometric analysis, not only including science and engineering journals, but also social science journals. Interestingly, almost all the above works were published in the journal that was the research target.
The second type of articles is focusing on a specific knowledge field. For example, Wei summarized output performances from top 5 economics journals, in which cross journals data are collected and ran in bibliometric environment (Wei, 2019). Merigo made collections on hot topics in business and economics researches, in which all papers were cross journals data collection and analysis based on the bibliometric, including one paper published on JBEM 2016 (Merigo et al., 2016). Zhang and Zhou (2019) collected 1120 papers studying the water foot print, made a summary for its research hot topics. Industrial Symbiosis is a keyword and field that had been evaluated systematically (Akhtar et al., 2019).
The last type of articles is review articles that mined the text and visualization in knowledge discovery. It usually provides the global trends and future forecasting in different disciplinary. This method has its great advantages in scientific research. It provided new ways to have new output visualization better than before. There are so many papers within this topic. Yu et al. (2019a) presented the coal research review published on Journal of Cleaner Production, gave us a new perspective in review article. Yu used the method in a section in his paper (Yu et al., 2017(Yu et al., , 2018. Garrigos-Simon and Liu summarized the global trend of human capital development researches from bibliometric and visualization analysis methods after the statistics of research literature on human capital published the relevant research results in the Sustainability journal (Garrigos-Simon et al., 2018;Liu, 2017aLiu, , 2017b). Olczyk's paper published on the JBEM also witnessed the broad application using bibliometric (Olczyk, 2016), where he summarized the concept of International Competitiveness.
After surveys and observations, it is essential to have a retrospective review of the JEBM based on the articles published and available in Web of Science ® (WOS). We conduct such a comprehensive bibliometric profile that will help answer questions like: 1) What are the journal impact factors, total cites, their knowledge sources, and their influential fields? 2) Who are the most productive authors, the prolific institution, and the leading countries? 3) What are the main research themes and their changes of the JEBM in the past several years? 4) What are the citation impact of co-occurrences keywords of the JEBM? What does it mean for potential submitting paper? Lastly, we hope to explore the research status of JBEM by bibliometric analysis, through which some meaningful information will be provided to improve the deep understanding of published articles. Therefore, in this study, we will draw a bibliometric retrospective knowledge landscape. The content in this paper would like to contribute and enrich the knowledge communication in business and economics. The text mining technology is one of the popular techniques in summarizing bibliographies, which could be informative and insightful for readers and forthcoming contributors.
The article was divided into 4 sections, which were Introduction, Materials and Methods, Results and Discussions as well as Conclusions, respectively. The study firstly explained what bibliometric analysis is and why we conduct a bibliometric analysis on JBEM in the Introduction section. In the next section, Materials and Methods, the process of the collecting data and what tools and software we adopted were elaborated. As for the section of Results and Discussions, the data collected were analyzed from three aspects: Dynamics and Trends of Publications, Productive and Influential Contributors, Thematic and Hot topic changes, which provided a comprehensive analysis to JBEM from different angles. At the last section, the main findings, limitations and future research possibilities were provided.

Data collection
Founded by the American Institute for Science Information (ISI), SSCI (Social Sciences Citation Index) is a world-renowned Citation database of scientific and technological literature in the field of humanities and Social Sciences, including more than 3,300 high-quality academic journals in more than 50 research fields, including politics, economy, law, education, psychology, geography and history. It is an important tool for researchers to engage in social science research. It provides great convenience for researchers in the social science field to engage in academic research, institution cooperation establishing and new knowledge discovery. The SSCI database is also commonly used for bibliometric analysis (Ho, 2014). This paper takes Social Science Citation Index (SSCI) in Web of Science ® (WOS) core collections as the data sources to retrieve and download papers meta data. We took Journal of Business Economics and Management as publication name field to conduct searches. In total 683 records from 2007 to 2019 were downloaded in WOS for further analysis. The downloaded information included authors, title, publication year, page numbers, contact address, author keywords, keywords plus, countries/territories, institutions, journals, abstract, country, citations, and Web of Science categories. The SSCI database collected JBEM publications from 2007 till now. These publications document type distribute as articles (662), reviews (8), book reviews (5), correction (6), editorial materials (1) and retraction (1). In this study, only articles (662) and reviews (8) are used as the data sources for analysis.

Glossary and methods description
As mentioned above, a total of 683 JBEM publications were found in the SSCI database over the last decades. This section provides a detailed analysis of all the JBEM publications yearly or periodically. Various kinds of indicators are designed to describe the characteristics of these publications and their representative meanings are defined as follows: TP: Total publication number: article or review, exclude other document type in web of science. TC: Total citations, total number of citations to all papers. NA: Number of Authors. TCR: Total Cited References. ANA: Average number of authors per paper, ANA = NA/TP. AP: Average paper length of published articles. 0C: The number of papers with "0" citation. H-index: The h-index was proposed in 2005 by Hirsch (Hirsch, 2005). The h-index of a scientist means that h articles in the published N p papers are cited at least h times, while the rest of the N p -h papers are cited less than or equal to h times. The h-index not only reflects the frequency that a journal is cited, but also reflects the value and quality of the journal in a certain period of time. Unlike evaluating individual achievement, the journal's h-index is not about "life-time contribution", but the most common case is a single year, using in different situation.
There are many powerful tools or software for knowledge discovery, knowledge visualization, text mining, including Citespace, VOSViewer Waltman et al., 2010), Histcite, Bibcomb, pajak... These tools used common meta in papers: title, author, keywords, affiliation, references, grants to disclose the connecting network underline the text. By visualization technology, it adopted co-citation, co-occurrence, co-authorship, citations, bibliographic coupling to create maps connecting countries, organizations, institutions. This is an energetic research field.

Dynamics and trends of publications
Among all these 670 publications, there are1373 authors in total, 31016 cited references, and 1706 keywords.

Annual publications and trends
The data in the following Table 1 was collected and calculated through the electronic sheet. We introduce the indicator "0C" to reflect the published articles impact in scientific communication. We did not take the recent 3 years value into account as the recent 3 years "0" citation paper number does not represent the influential count of citation. The newer publication published, the less citation it receives in WOS system (Seltzer, 2018). Table 1 presents the publishing profile of the JBEM from 2007 to 2019. As shown in the table, the trend of total publication number (TP) tended to be fluctuated, it initially increased gradually from 2007-2013, after TP reached the peak in 2013, and it experienced a sharp fluctuation and ultimately leveled up this year. During 2007-2008, total citations (TC) soared from 220 to 816 and basically kept steady until 2010, however, it witnessed a downward trend since then. As for total cited references (TCR) and average cited references (ACR), it seemed that the trend of TCR was fluctuated from 2007 to 2019 but it actually changed mainly with the change of total publication number; Nevertheless, ACR showed an upward trend between 2007 and 2019, since the prevalence and popularization of the internet, scholars are more easily to get access to online publications, as the result, the number of average cited references all were approximately 50 in recent years, which was much higher than a decade ago. In addition, there were two indexes about author, which were number of authors (NA) and average number of authors per paper (ANA) respectively. NA was similar to the trend of TP and ANA that increased steadily in past 13 years, which demonstrated that authors prefer to work with more other authors compared with past. In term of h-index, the trend of them were consistent. They both reached the highest point in 2008, which were 24 and 17 respectively and both reached the lowest point in 2019, which were 0.48 and 3 respectively. There was a significant gap between the highest and lowest. At the last column, we collected the number of papers with "0" citation for publishing reference, the older the publication, the less "0" citation. In recent 3 years, we did not collect the indicator, in which reason lies in the newer publication, the more "0" citation.  There is a highly connections between 0 citation papers and the highest citation received time. In early years from 2007-2011, all papers had been cited, therefore the indicator of 0C had been 0. The highest total citations received yearly was in 2008 reaching to be 816, following decreasing in the thereafter years. The ATC means that each paper published on JBEM had received 7.24 times citations. This is a very important indicator for forthcoming authors who is expecting to have expected citation times. It is generally argued that the self-citation rate of a mature journal should not be greater than 20% . The current self-citation rate on JBEM is highly correlated. As a result, there is a need for the articles submitted to JBEM to slightly increase citation from other best journals and slightly decrease citation from JBEM to reduce the self-citation rate. This reflects that JBEM itself is the most competitive journal or sister journal: "from and to". It is suggested that all the new contributor or author should have a retrospective search on the published articles in JBEM, seeking similar articles. So that it might fit the knowledge mainstreams.
The knowledge flow to and from JBEM is also shown in Figure 3 and Figure 4. In Figure 3, the size of the node represents the number of cited times by JBEM. As can be seen in Figure 3, the main journals connecting each other is JBEM itself. The Journal of Finance, Strategic Management Journal, Journal of Marketing and Journal of Financial Economics which were cited by JBEM more than 300 times.
The colors of the nodes in Figure 3 and 4 represents the discipline to which the journal belonged to and the same color indicates that journals belong to the same discipline. It is easy to see from Figure 3, that there are five clusters, in which the purple nodes represent the clustered journals belong to general economic management, the blue clustered nodes represent the journals belong to operation and decision-making, management science, the yellow clustered nodes represent the journals belong to marketing, the green clustered nodes represent the journals belong to enterprise management and strategic management, while the clustered red nodes represent the journals on company finance studies. These 5 disciplines are typically mainstream in Economics and Management Science.
Similarly, Figure 4 demonstrates the status of publications in JBEM cited by other journals from 2007 through 2019, interpreting as knowledge sources for other journals and other publications. It is easy to observe that the JBEM itself win the first place, followed by Technological and Economic Development of Economy, Inzinerine Ekonomika-Engineering Economics, Transformations in Business & Economics and Sustainability. The colors of the nodes in Figure 4 also represent the discipline to which the journal belongs to and the same color indicates that journals belong to the same discipline. All journal names showed here are sister journals within the same field clusters which will be proved again by keywords cooccurrence analysis.  Figure 3 and 4 present the knowledge or information structure of JBEM. All the important literature are connected through these nexus. If you are the forthcoming author, new papers with reference structure like current structures will be more likely be accepted. Good paper should have a broad review on the published similar publication in these knowledge structure, then bring new ideas or innovations to JBEM. If the new papers references have less likely reference structure, it might not have been in scope of the JBEM.

Productive and influential contributors 2.2.1. Leading authors and knowledge sources
By the year of 2019, the JBEM includes publications from 1373 authors. Among these authors, 1,074 authors only published one article, 119 authors published two articles for each author, 39 authors published three articles for each author and 29 authors published more than three articles for each author. Table 2 displays the most productive authors of the JBEM with publications (>5). As can be seen from Table 2 Interestingly, 10 of the top 14 authors in terms of number of articles published in Journal of Business Economics and Management (JBEM) were from this Vilnius Gediminas Technical University which is the sponsor of the journal. This indicates that the journal has become an important way to publicize the disseminating management ideas of Vilnius Gediminas Technical University. For further study, we also employ h-index to evaluate the top 14 authors' performances, the results indicate that Zavadskas E. K., Ginevicius R. and Tvaronaviciene M., all three are from Vilnius Gediminas Technical University, not only are the authors in the top three for the number of articles published, but they also win the top three places in the h-index. This indicator shows that they contribute great new ideas and discoveries to business fields.
Among all the publication, Wei guiwu was enlisted as highly cited paper in Essential Science Indicators (ESI) database since May 10, 2019 (Wei, 2016). A Highly Cited Paper is a paper that received citations in the top 1% of the academic field of economic and business based on a highly cited threshold for the field and publications. This one is effective as of May 9 till July 10, 2019, when ESI updated on May 9, 2019, covering a 10 year and 2 months period, January 1, 2009 -February 28, 2019. This is the first bi-monthly update of 2019. Furthermore, Wei Guiwu had been identified as Highly Cited Researcher list released by Clarivate Analystics in 2015, 2016, 2017. This paper had received 103 citations since 2016 (Wei, 2016). This indicator shows that the highly recognized scholar bring better contribution to journal development.
The top 10 most cited papers in all the publications are also deserve further discussion. They proved that the founder of the JBEM had made great contributions and influential knowledge in the business and economics fields. Most of these highly cited papers published during 2008-2010, it implies that the published original innovations papers need 10 years reaching its peak citations. These 8 papers were from management sciences, which the keywords including AHP, SWOT methodology, TOPSIS, competitiveness, were all important methodology. 8 of the 10 articles are from Lithuanian authors who were working at Vilnius Gediminas Technical University. As it is a Lithuanian university and publisher of JBEM, it is necessary to conduct the citation analysis of the eight most cited Lithuanian articles, which is of great reference value for the academic research of JBEM, Vilnius Gediminas Technical University and even Lithuania authors. We had further studied the citations that had cited these 8 papers.
The citations represented by these 8 papers give us some clues in knowledge discovery. It can be analyzed from 4 aspects: the top 10 journals/conferences, institutions, countries the only conference was also held in 2010 in Vilnius, the capital of Lithuania. It can be referred that most of the citations to these eight articles come from Lithuania, especially Vilnius Gediminas Technical University, which also corresponds to the institutions and countries in the latter two columns (Supplementary material, Table A2). The most cited institutions and countries are Vilnius Gediminas Technical University and Lithuania, respectively, which far exceed other countries and institutions. But the influence of these eight articles is not only within the Lithuanian countries, it also demonstrates that these articles have also been cited by Iran, Serbia, China, Turkey, Poland, the Czech Republic and Malaysia, which to some extent that they have certain influence in Eastern Europe and Asia. As for the top ten keywords in the articles citing these eight articles, we can also find that these ten keywords are some of the fields, methods, and hot words in the previously mentioned fields, among which multiple-criteria decision analysis is the most adopted methods.

Leading institutions
From the section 2.2.1, the leading productive authors, we know, among 14 authors, 10 were from Vilnius Gediminas Technical University. This university played important role and ranked as top university in Business and Economics. The newly updated ESI data proved that it is ranked as 294 of total 333 top 1% organizations. In addition, there are many other renowned institutions contributed to JBEM, in this section, the 15 Most productive institutions in the JBEM was discussed in detail. The data shows the top 15 most productive institutions, with the number of publications being greater than 5. Vilnius Gediminas Technical University (n = 125, 19.90%) ranks first in the number of publications, followed by Kaunas University of Technology (n = 15, 2.39%), University of Ljubljana (n = 15, 2.39%), Tomas Bata University Zlin (n = 10, 1.59%), University of Economics Prague(n = 10, 1.59%), University of Maribor (n = 10, 1.59%), University of Zaragoza (n = 10, 1.59%), Universiti Kebangsaan Malaysia (n = 9, 1.43%), Eastern Mediterranean University (n = 7, 1.12%), Islamic Azad University (n = 7, 1.12%), Universidade Da Beira Interior (n = 7, 1.12%), and Universidade De Lisboa (n = 7, 1.12%). As for the average citation, Vilnius Gediminas Technical University (16.14, Lithuania) has the highest average citation frequency. It was followed by Islamic Azad University (15.57, Iran), Estonian Business School (12.60, Estonia), Eastern Mediterranean University (12.14, The Czech Republic), University of Economics Prague (11.4, The Czech Republic), City University of Hong Kong (10.6, China) and Universiti Kebangsaan Malaysia (10.11,Malaysia). Interestingly, among these 15 institutions, only one of the 15 most productive institutions is from North America (University of Memphis, USA), three of them are from Asia (Universiti Kebangsaan Malaysia, Malaysia; Islamic Azad University, Iran; Universiti Putra Malaysia, Malaysia), and the rest are from Europe. So, in the JBEM, European institutions account for the largest proportion and the contribution from Asia universities is becoming increasingly important to some extent, it can reflect the degree of JBEM's impact on these areas. Besides, among all the institution, except for Tomas Bata University Zlin and University of Economics Prague, the rest all are enlisted as top 1% universities in ESI database (as of September 11, 2019), which further manifest the research quality of these institution.

Leading countries/territories
Until the year 2019, a total of 66 countries (territories) and 577 institutions have published their articles in the Journal of Business Economics and Management (JBEM). Table 3 displayed the most productive countries (territories) which have been published more than 10 articles. The most productive country (territories) is Lithuania (n = 156, 24.84%) which is also the registered country of the publication. Followed by Spain (n = 69, 10.99%), USA (n = 47, 7.48%), Turkey (n = 46, 7.33%), Peoples R China (n = 39, 6.21%), Taiwan (n = 38, 6.05%), Czech Republic (n = 34, 5.41%), Malaysia (n = 34, 5.41%) and have published more than 30 of the publications. Table 3 also displays the total citations of the most productive countries (territories), which points out that Lithuania (n = 2,187), Iran (n = 359), Turkey (n = 332), USA (n = 328) and Peoples R China (n = 311) are noteworthy high influence contributors to the journal. The h-index analysis of the most productive countries (territories) indicates that some countries (territories) perform well on h-index, such as Lithuania (h-index = 25), Iran (h-index = 11), USA (h-index = 11) and Turkey (h-index = 11). Also, after integrated the analysis results of number of publications, total citations, total citations/ publication and h-index analysis, we must highlight Lithuania is the best-performing country. Besides, it is interesting to note that Asian countries (territories) are not as good as European countries (territories) in terms of number of publications, the average citations number of Asian countries (territories) is at a relatively high level, for instance, the average citations number of China, Malaysia and Iran are all higher than 7, which even performed better than some countries (territories) with high scientific research level, such as the USA and England, this could manifest the progress of scientific research in Asia.

Thematic and hot topic changes
In the bibliometric, the co-occurrence of the keywords represents the publication topic changes. Keywords information about the core content of articles are listed. Therefore, keyword analysis can be used to identify evolving research frontiers relating to a knowledge domain (Silva & Teixeira, 2011). Keywords can summarize the core meaning of the article and add richer interpretations to understanding the concentration of research themes since underlying concepts of an article. They were selected by authors and gives reader landmark and clue to capture its main topic. Therefore, keywords investigation of Journal of Business Economics and Management can add more explanations to help readers to understand the concentration of the journal. Based on its frequency of appearance, the keyword form can give us many interesting information.
The focus and hot topics in different stage always change with the time. In this section, we are going to survey the co-occurrence of keywords in different period, so as to identify the academic trends. In order to identify the topics changes over the periods of the JBEM publications, all 13 years from 2007-2019 can be divided into three different sub stages: 2007~2010, 2011~2014, and 2015~2019. In each part, the co-occurrence networks of each keyword can be compared separately and listed in forms. The most frequently used keyword is "performance" in the all three stage, which presents the whole economic and business research, while, the There are some changes in the co-occurrence of keywords published in the JBEM in the past 13 years. Apparently, the keyword "Lithuania" in many papers during 2007-2010, however, it had been dropped out of the scope of authors in next two stages. This is to certificate that local economics problem had been replaced steadily by other international problems, which means the journal are accepting more new papers on other countries. Same topic including keywords: "China", "Construction", "FDI", "Sustainable Development", "Alternatives" have same situation. In subset II, keywords: "Volatility", "Environment", "Investment", "Ownership", "Structure" are key topics during 2011-2014. In recent 5 years, keywords, " Information", "SMEs", "Framework", "Perspective" are new research topics and new trends with highly occurrence frequency. Table 4 shows us some topics have crossed two subsets. For example, "behavior", "Decision Making" and "selection" are highly presented during 2007-2014, while "productivity", "Innovation", "Industry", "Risk" and "Efficiency" were hot topics during 2014-2019. Only two keywords, "market" and "strategy" are hot topic in subset I and subset III.
It deserves to notice that all the keywords presented here can be found in difference papers in its keywords or author plus keywords edited by experts in Web of Science editorial team. Moreover, content analysis of "frequency word count" was used to observe the impact of special issues on the development of increasing interest in a particular area (Akmal et al., 2018).

Keywords comparison
In this section, we have had a deep text mining and comparison between the JBEM and all Highly Cited Paper and Hot paper in Web of Science. The aims are to have a comprehensive understanding of all published articles. So that the reader will have a clue to choose their research directions, and make new contributions.
Highly cited papers & Hot papers are current trends and mainstream in a particular field. We take the "business" and "economics" as the subject keywords and search in the Web of Science database. A total of 485 highly cited papers and 36 hot papers were selected for analysis. Then, we had received the highly frequent co-occurrence keywords that is listed in Table 5. Scholars focus on sustainability, big data, circular economy, corporate social responsibility, sustainable development, economics, business model, literature review, sharing economy.
According to the comparison, it can be seen that in recent years, the papers published by JBEM are very different form the keywords of highly cited papers and hot papers in the similar fields. JBEM pays more attention to general topics in the management field such as "management" and "performance", while highly cited papers and hot papers pay more attention to today's hot topics such as "sustainability" and "big data".
The keyword "performance" co-occurs in different text and research fields ( Figure 5). Performance is highly associated with financial performance, firm performance, organizational performance, performance measurement. It is an ongoing research field, including firm,  SMEs, innovation, productivity. All the perspective researchers are highly recommended that previous performance research should be referred and evaluated.

Conclusions
This study presents a bibliometric analysis on all the indexed records from JBEM publications in the SSCI database. The basic characteristics of the JBEM journal, including annual publication trends, knowledge communications, the influential contributors as well as thematic topics change were studied in detail.
The results indicate that the number of papers published each year by the JBEM journal is relatively stable and is slightly reduced and published papers has an expected citation number of 7.68 times. The prestigious publications, such as UT 24 journals, consisted with the knowledge sources, and environment economics are becoming more popular than before in recent publications. Management science (decision-making), marketing, finance, firm governance, technological economics, econometrics are mainstreams in all publications. The keyword, "Performance" is the most frequent occurrence in all papers. Among the 10 most cited papers, eight articles have considerable influence in Lithuania, Asia, and Eastern Europe, and are also contributive for economics, management, civil engineering, sustainability and transportation research.
Among all the leading institutions or organizations, 3 universities from 1% top universities in ESI database contribute 137 papers, taking 21.8% of all records. One highly cited researcher brought 1 published paper with 103 citations. The authors of the JBEM journal are internationally distributed in Lithuania, Spain, USA, Turkey, China and other countries/ territories. The question of how to make more countries with influential scientific research strength pay attention to this journal is an important challenge in the future. In addition, the number of papers published since 2016 has decreased considerably, in that case, the question is how to maintain or improve the IF of this journal is another important challenge. It is suggested that more papers from highly cited researchers be published in this journal in order to improve their influence.
The difference in frequency of keywords in different stages give us informative clue for future studies. The topic of the journal has been changed with time. At the beginning, many papers are published centering the economic problems in Lithuania, then, more papers studying the theoretical problem were accepted in recent years. As the world economy is facing various pressures, such as transformation, economic growth, trade wars, the new trends represented by circular economy and share economy had received attentions in highly cited papers and hot papers. These are new trends deserved new submissions contributing their thoughts and discoveries.
There are also some limitations in the article, since we collected the data from Web of Science and this database is constantly updating, the analysis could just reflect the performance of JBEM at certain period. In addition, there are some aspects can be further analyzed, for example, keywords comparison could be further explored, future research should reflect more about the changes of keywords, which may have more practical significance. At the same time, this article is also useful for many scholars. This type of article can be applied to different journals to study the performance of them.

Author contributions
Xintu Lei and Qingyuan Xu conceived the study and were responsible for the design and development of the data analysis. Xintu Lei was responsible for data collection and analysis, as well as data interpretation. Qingyuan Xu was responsible for language check and wrote the first draft, revision of the article.

Disclosure statement
We declare that we do not have any competing financial, professional, or personal interests from other parties.