Document is current

Article History

Received: 9 March 2022

Accepted: 12 August 2022

First Online: 2 September 2022

Declarations

:

: The research protocol was assessed and ethics approval was obtained from all five hospitals, including Research Ethics Committee of Children’s Hospital of Fudan University, Research Ethics Committee of Wuhan Children’s Hospital, Research Ethics Committee of Henan Children’s Hospital (Zhengzhou Children’s Hospital), Research Ethics Committee of Hunan Children’s Hospital, Research Ethics Committee of Children’s Hospital of Fudan University Xiamen Branch. Informed consent was obtained from a parent or other legal guardians of all individual participants included in the study. All the methods were performed in accordance with the relevant guidelines and regulations.

: Not applicable.

: The authors declare that they have no competing interests.