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.