Wang, Yacui
Wang, Yi
Jiao, Weiwei
Li, Jieqiong
Quan, Shuting
Sun, Lin
Wang, Yonghong
Qi, Xue
Wang, Xingyun
Shen, Adong
Article History
Received: 16 July 2019
Accepted: 23 November 2019
First Online: 5 December 2019
Ethics approval and consent to participate
: Informed consent was acquired from all the guardians of the enrolled children, and the study was approved by Ethical committee of Beijing Children’s Hospital.
: No applicable.
: The authors declare that they have no competing interests.