Contribution to authorship
YC conceived and designed the study, obtained funding for the study, led
the execution of the study including data analysis and interpretation,
drafted the first draft of the manuscript and critically reviewed final
drafts. YL assisted in designing, executing, interpreting the data and
critically revised the draft of the manuscript. XG, FJ, YZ, XH, LJ, TC,
XD, XH, YL, WL, GQ, JS, WX, LZ, and YZ conducted data collection and
critically revised the draft of the manuscript. YZ contributed to data
analysis, interpretation and review of the manuscript. All authors read
and approved the final manuscript.