Liu, Xiaoyu
Xu, Jianhui
Li, Siwei
Wang, Xueqin
Liu, Jin
Li, Xin
Article History
Received: 15 May 2022
Accepted: 15 December 2022
First Online: 21 December 2022
Declarations
:
: This epidemiological investigation and the study was approved by the Ethics Committee of the Second Hospital of Jinzhou Medical University, China. This epidemiological survey and the study is in line with the Declaration of Helsinki. A signed informed consent form was obtained from the family member of all the participants/children and the participants/children before the children participated in the study.
: Not applicable.
: The author declares that there are no competing interests.