AUTHOR CONTRIBUTIONS
Mei–Feng Chen: the conception and design of the study; acquisition of data; drafting of the article. Wei He: defining the cases and revising them critically for important intellectual content. De‐Sheng Huang: analysis and interpretation of data. Hui Jia, Zhao‐Shuang Zhong, Nan Li, Shan‐Shan Li: acquisition of data. Shu‐yue Xia: revising them critically for important intellectual content; final approval of the version to be submitted.