Fan, Yonggang
Ni, Shuangfei
Zhang, Huafeng
Article History
Received: 28 May 2021
Accepted: 15 July 2021
First Online: 20 July 2021
Declarations
:
: NHANES was approved by the National Center for Health Statistics Research Ethics Review Board.
: Not applicable.
: Not applicable.
: The authors declare no competing interests.