Funding for this research was provided by:
the National Key Research and Development Program of China (2017YFC0907004)
the National Natural Science Foundation of China (82171584)
the 2020 Milstein Medical Asian American Partnership Foundation Irma and Paul Milstein Program for Senior Health project award
Article History
Received: 8 October 2021
Accepted: 11 May 2022
First Online: 3 June 2022
Declarations
:
: This study conformed to the provisions of the Declaration of Helsinki. The CHARLS was approved by the Ethics Review Committee of Peking University. Informed consent was obtained from all participants.
: Not applicable.
: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.