Lu, Chunyu
Zong, Jingru
Wang, Lingli
Du, Yajie
Wang, Qing
Article History
Received: 22 June 2022
Accepted: 19 September 2022
First Online: 3 October 2022
Declarations
:
: Each participant included in this study signed a written informed consent form before taking the survey. Ethics approval for the data collection in CHARLS was obtained from the Biomedical Ethics Review Committee of Peking University (IRB00001052-11015). We confirmed that all methods in our study were carried out in accordance with relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.