Authorship contributions
Jing Liu carried out the initial analyses and drafted the initial
manuscript; Yuelun Zhang checked the initial analyses and revised the
manuscript; Juan Xiao designed the study and revised the manuscript;
Hongmei Song, Mingsheng Ma, Zhuo Li, and Lejia Zhang critically reviewed
the manuscript for important intellectual content; Yuqing Song, Zichao
Lyu, and Yixiu Lu coordinated, supervised data collection, and provided
statistical support.