Chen, Meiyuan http://orcid.org/0000-0002-3182-2053
Xiao, Jing
Du, Yuan
Wang, Miaomiao
Ruan, Jimeng
Tian, Ye
Article History
Received: 30 September 2019
Accepted: 3 August 2020
First Online: 10 August 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Beijing Friendship Hospital Affiliated to the Capital Medical University (2019-P2–183-01). Written informed consent was obtained from the children’s parent(s) or guardian included in the study.
: Not applicable.
: The authors declare that they have no competing interests.