Funding for this research was provided by:
Basic and Applied Basic Research Foundation of Guangdong Province (2021A1515110743)
Innovation and Entrepreneurship Training Program for College Students of Guangdong Provine (S202112121145)
Science and Technology Innovation Strategy Special Fund of Guangdong Provine (pdjh2022b0110)
Received: 2 December 2021
Accepted: 22 June 2022
First Online: 23 July 2022
: The Biomedical Ethics Review Committee of Peking University approved CHARLS, and all participants were required to provide written informed consent. The ethical approval number was IRB00001052–11015. The study was carried out following the tenets of the Declaration of Helsinki and Good Clinical Practice guidelines.
: Not applicable.
: The authors have no conflicts of interest to declare.