Article History
Received: 27 May 2019
Accepted: 3 December 2019
First Online: 6 January 2020
Ethics approval and consent to participate
: All participants have given written informed consent. Ethical approval for all the ELSA waves was granted from the National Research Ethics Service (MREC/01/2/91). The ELSA study is one of the longitudinal studies included in the ATHLOS project. All the studies included in the ATHLOS project have given permission for the secondary use of their data by the ATHLOS consortium.
: Not applicable.
: The authors declare that they have no competing interests.