Document is current
Any future updates will be listed below
-
Authors
Qiao, Huifen
Wang, Xiaorong
Qin, Zhenzhen
Wang, Na
Zhang, Ning
-
Funding
Funding for this research was provided by:
Nanjing Medical Science and Technique Development Foundation (ZKX16052, 201715058, QRX11038)
- License Information
-
More Information
Article History
Received: 10 September 2021
Accepted: 16 November 2021
First Online: 25 November 2021
Declarations
:
: Written informed consent was obtained from both schools and parents/guardians prior to the on-site survey. The Ethics Committee of Nanjing Municipal Center for Disease Control and Prevention, China, reviewed and approved this study (2017006).
: The authors declare that they have no competing interests.
