Jin, Mei
Liu, Jing
Liu, Kang
Zhao, Ziwei
Sun, Suzhen
Article History
Received: 2 July 2022
Accepted: 20 September 2023
First Online: 23 September 2023
Declarations
:
: The authors declare no competing interests.
: Legal guardians of all children provided written informed consent before inclusion. The study was granted ethical approval by the Ethics Committee of Children’s Hospital of Hebei province. The study was carried out following the ethical standards of the responsible committee on human experimentation and with the 1975 Helsinki Declaration and its later amendments.
: Not applicable.