Hou, Tianxue
Liu, Minhui
Zhang, Jinghui
Article History
Received: 4 March 2022
Accepted: 8 August 2022
First Online: 15 August 2022
Declarations
:
: The National Health and Aging Trends Study was approved by The Johns Hopkins University Institutional Review Board. Participants provided written informed consent. All methods were carried out in accordance with relevant guidelines and regulations (declaration of helsinki).
: Not applicable.
: The authors declare that they have no competing interests.