Yang, Jiafei
Xu, Haiming
Li, Jiangping
Zhao, Yu
Guan, Suzhen
Fu, Youjuan
Bao, Rui
Liu, Zhihong
Funding for this research was provided by:
the National Natural Science Foundation of China (81960018)
Article History
Received: 11 June 2021
Accepted: 20 May 2022
First Online: 4 June 2022
Declarations
:
: The original CHARLS was approved by the Ethical Review Committee of Peking University (IRB00001052-11015), and all participants signed the informed consent at the time of participation. The research has been performed in accordance with the Declaration of Helsinki.
: Not applicable.
: The authors declare no competing interests.