Duan, Qing
Tian, Xueying
Pang, Bo
Zhang, Yuwei
Xiao, Chuanhao
Yao, Mingxiao
Ding, Shujun
Zhang, Xiaomei
Jiang, Xiaolin
Kou, Zengqiang
Article History
Received: 12 August 2023
Accepted: 12 December 2023
First Online: 20 December 2023
Declarations
:
: The study was approved by the Ethical Committee of Shandong Center for Disease Prevention and Control. No personal information was collected in the study, the requirement for informed consent was waived by the Ethical Committee of Shandong Center for Disease Prevention and Control. In this study all applied methods were carried out in accordance with relevant guidelines and regulations.
: Not applicable.
: The authors declare no competing interests.