Contribution to authorship
Fang Zhang and Jianxin Tan participated in the design and revision of
the questionnaire, carried out the data collection and data
interpretation, and drafted manuscript. Binbin Shao, Yan Wang, and
Jingjing Zhang participated in the revision of the questionnaire,
carried out the survey and data collection under assistance by Xiuqing
Ji. Tao Jiang and Ran Zhou carried out the data analysis and statistical
analysis. Fengchang Qiao and Ya Wang assisted data interpretation and
revised the manuscript. Zhengfeng Xu and Ping Hu participated in the
design and coordination of the study, revised the manuscript, and
supervised the study. All authors read and approved the final draft of
the paper.