Yu, Xiaolin
Fang, Ming
Wang, Shuang
Li, Zhong
Cheng, Lixiao
Liu, Zhaoshan
Zhang, Dandan
Dong, Dandan
Kou, Zengqiang
Article History
Received: 26 May 2022
Accepted: 25 October 2022
First Online: 22 November 2022
Declarations
:
: We confirm that all methods were carried out in accordance with relevant guidelines and regulations of Helsinki declaration. The principle of informed consent was approved by ethics Committee of Shandong CDC.
: Not applicable.
: The authors declare that they have no competing interests.