Zhu, Zhongxin
Zhao, Jin
Fang, Yanfei
Hua, Rongwei
Article History
Received: 20 August 2021
Accepted: 18 October 2021
First Online: 30 October 2021
Declarations
:
: The ethics review board of the National Center for Health Statistics approved all NHANES protocols, and written informed consents were obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.