Niu, Dandan
Xiao, Ticheng
Chen, Yuanyi
Tang, Houlin
Chen, Fangfang
Cai, Chang
Qin, Qianqian
Zhao, Decai
Jin, Yichen
Wang, Shi
Hou, Yushan
Lu, Zhen
Yang, Luoyao
Liu, Hong
Xie, Dongqin
Zou, Huachun
Lyu, Fan
Article History
Received: 22 September 2022
Accepted: 15 March 2023
First Online: 29 March 2023
Declarations
:
: The Institutional Review Board of National Center for AIDS/STD Control and Prevention, Chinese Center for Disease Control and Prevention (X220314674) gave ethical approval for this study. Since all data were deidentifed and provided in the aggregated form, the informed consent was waived. All methods were performed in accordance with the Declaration of Helsink.
: Not applicable as all data are presented in the aggregate.
: All authors declare no competing interests.