Ford, John A. http://orcid.org/0000-0001-8033-7081
Jones, Andy
Wong, Geoff
Clark, Allan
Porter, Tom
Steel, Nick
Funding for this research was provided by:
Research Trainees Coordinating Centre (DRF-2014-07-083)
Article History
Received: 15 June 2017
Accepted: 31 May 2018
First Online: 19 June 2018
Ethics approval and consent to participate
: The London Multicentre Research Ethics Committee granted ethical approval for the ELSA (MREC/01/2/91), and informed written consent was obtained from all participants.
: The authors declare that they have no competing interests.
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