Shen, Yidong
Li, Yamin
Shi, Lijuan
Liu, Mengmeng
Wu, Renrong
Xia, Kun
Zhang, Fengyu
Ou, Jianjun
Zhao, Jingping
Article History
Received: 4 June 2019
Revised: 15 November 2019
Accepted: 23 November 2019
First Online: 24 April 2020
Competing interests
: The authors declare no competing interests.
: The ethics committee of the Second Xiangya Hospital, Central South University approved this study, and the parents provided written informed consent for all children.