Peng, Xiaoyin
Qu, Yujin
Li, Xiaohui
Liu, Junting
Shan, Xinying
Wang, Jia
Song, Fang
Article History
Received: 18 January 2021
Accepted: 15 August 2021
First Online: 24 August 2021
Declarations
:
: This study was approved by the Ethics Committee of the Capital Institute of Pediatrics (No. SHERLL2017007). Written informed consent was obtained from the parents or guardians of the participating children. All study methods were carried out in accordance with relevant guidelines and regulations.
: Written consent for publication was obtained from the parents of all subjects as part of their written informed consent to participate in this study.
: The authors declare that they have no competing interests.