Zhang, Ruyi
Huang, Qin
Su, Guanhua
Wei, Muhong
Cui, Yuan
Zhou, Haolong
Song, Wenjing
Di, Dongsheng
Liu, Junan
Wang, Qi
Article History
Received: 8 August 2022
Accepted: 27 January 2023
First Online: 10 February 2023
Declarations
:
: The study was conducted according to the guidelines of the Declaration of Helsinki, and approved by the Ethics Review Committee of American National Health Statistics Center. Informed consent was obtained from all subjects involved in this study.
: Not applicable.
: The authors declare no competing interests.