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Article History

Received: 9 March 2022

Accepted: 12 July 2022

First Online: 16 July 2022

Declarations

:

: This study is based on secondary data analysis. No extra ethical approval is needed. Ethical approvals for HRS and ELSA were granted from the University of Michigan Institutional Review Board and the London Multicentre Research Ethics Committee (MREC/01/2/91), respectively. Informed consent was obtained from all participants. All methods were performed in accordance with the relevant guidelines and regulations.

: Not applicable.

: The authors declare that they have no competing interests.