Li, Liangliang
Xu, Shimin
Li, Miaomiao
Yin, Xiangyun
Xi, Hongmin
Yang, Ping
Ma, Lili
Zhang, Lijuan
Li, Xianghong
Article History
Received: 5 December 2022
Accepted: 11 January 2024
First Online: 12 February 2024
Declarations
:
: The study was approved by the Ethics Committee of the affiliated hospital of Qingdao university. Informed consent was obtained from the parents of the children. All methods were performed in accordance with the ethical guidelines.
: Not applicable.
: The authors declare no competing interests.