Jiang, Runxue
Wang, Xia
Li, Zhi
Cai, Haifeng
Sun, Zhiguo
Wu, Shouling
Chen, Shuohua
Hu, Hailong
Article History
Received: 31 January 2022
Accepted: 15 September 2023
First Online: 22 September 2023
Declarations
:
: The study was conducted in accordance with the Declaration of Helsinki and was approved by the Ethics Committee of Kailuan General Hospital. Written informed consent was obtained from participants and from parents and/or legal guardians (illiterate participants).
: Not applicable.
: The authors declare no competing interests.