The journal can accept supplementary files that support the submitted article (e.g. audio, movie, or text files: for example a survey questionnaire which is described in the article). Supplemental information should be provided with the submission. It will not be formally reviewed but will be considered to determine whether it is required by the article. Please note that authors take fully responsibility for the content of any supplemental information, and a disclaimer on the supplemental information must clearly state that they have not been formally reviewed.

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