Liu, Qiongshan
Hu, Shijian
Fan, Fufang
Zheng, Zhixiang
Zhou, Xinye
Zhang, Yuanfeng http://orcid.org/0000-0002-4330-072X
Article History
Received: 16 January 2023
Accepted: 28 April 2023
First Online: 4 May 2023
Declarations
:
: All participants provided written informed consent and study procedures were approved by the National Center for Health Statistics Research Ethics Review Board.
: The manuscript is approved by all authors for publication.
: The authors declare no or competing interests.