Article History
Received: 16 June 2022
Accepted: 8 August 2022
First Online: 16 August 2022
Declarations
:
: The Ethics Committee of The People’s Hospital of Jiaocheng County, Shanxi Province, gave their approval to this study. Parents/ guardians of the children who were involved in the study gave written and informed consent for their children to participate in our study. The research adhered to the tenets of the Declaration of Helsinki.
: Not applicable.
: The authors declare no conflicts of interest.