Authorship and author contribution
All named authors meet the International Committee of Medical Journal
Editors (ICMJE) criteria for authorship for this article, take
responsibility for the integrity of the work as a whole, and have given
their approval for this version to be published. Conception and design
of the study: DW, FX and XQC. Literature search and collection and
compiled pictures and videos: JRC, JQC. Acquisition, analysis and
interpretation of data: WG, HG, JCH, and XLY. Drafting the article and
revising it critically for important intellectual content: JRC, JQC, DW
and FX. Final approval of the article: JRC, JQC, WG, HG, XQC, XNW, FX
and DW. JRC and JQC should be
considered joint first author.