Liu, Haixia
Zhang, Yuzhou
Zhang, Hong
Zheng, Yunhe
Gou, Faxiang
Yang, Xiaoting
Cheng, Yao
McClymont, Hannah
Li, Hui
Liu, Xinfeng
Hu, Wenbiao
Funding for this research was provided by:
Health and Family Planning Commission of Gansu (GSWSKY-2019-83)
Article History
Received: 11 May 2021
Accepted: 13 April 2022
First Online: 26 April 2022
Declarations
:
: The implementation of the project has been approved by the ethics committee of Gansu Provincial Centers for Disease Control and Prevention (GSCDCEC2019[012]). As no personal information was collected in the study, the requirement of consent was waived. In this study all applied methods were carried out in accordance with relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.