AUTHOR CONTRIBUTIONS
Study concept and design: Lihua Song, Yigang Tong; Data acquisition : Shanshan Lu, Shengdong Luo, Wen Xu, Bixia Hong, Wen Xu, Hongbin Ma; Analysis and interpretation of data : Huahao Fan, Bingke Bai, Zhenping Fan, Hongbin Ma, Weiwei Chen; Manuscript write‐up : Lihua Song, Shanshan Lu. Revision and approval of the final draft by all authors