Qiao, Fulu
Ma, Teng
Wang, Xia
Zhang, Feng
Wan, Long
Article History
Received: 12 August 2023
Accepted: 5 November 2023
First Online: 10 December 2023
Declarations
:
: The study was approved by the institutional review board of National Center for Health Statistics (Protocol #2005-06) and written informed consent was obtained from all subjects.
: Not applicable.
: The authors declare that they have no competing interests.