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.