Guo, Xiaoxu
Xu, Chenzhao
Li, Yaqiang
Article History
Received: 13 September 2022
Accepted: 12 December 2022
First Online: 2 January 2023
Declarations
:
: The protocol was approved by the National Center for Health Statistics of the Center for Disease Control and Prevention Institutional Review Board (Protocol #2011-17), all participants provided written informed consent.
: Not applicable.
: The authors have no conflicts of interest to disclose.