Li, Wei
Song, Jukun
Chen, Zhu
Funding for this research was provided by:
Science and Technology Fund of Guizhou Provincial Health Commission (gzwkj2021-341)
Article History
Received: 12 April 2022
Accepted: 29 August 2022
First Online: 8 September 2022
Declarations
:
: All study participants gave written informed consent in accordance with the National Center for Health Statistics’ Research Ethics Review Board (Protocol #2009–14) and study ethic guidelines at the Centers for Disease Control and Prevention. Parental consent was obtained for participates age 15 and below.
: Not applicable.
: The authors declare that they have no competing interests.