Liu, Jing
Jin, Mei
Zhang, Meijie
Wang, Yonggang
Sun, Suzhen
Article History
Received: 3 February 2023
Accepted: 18 January 2024
First Online: 2 February 2024
Declarations
:
: 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.
: The authors declare no competing interests.