10. Author contributions
Research idea and study design: Hui Yang and Xingxing Chai. Data
collection: Hui Yang, Yuemin Gong, Xinyu Zhang, Lingling Wang, Jinge Xu,
Dan Xu. Data analysis: Hui Yang, Xingxing Chai and Xiaoyu Chen. Wrote
the manuscript: Hui Yang and Xingxing Chai. Supervision or mentorship:
Xin Zhou, Jianyong Li and Guangsheng He.