Funding for this research was provided by:
Economic and Social Research Council (ES/K005146/1, ES/N00812X/1)
Medical Research Council (K013807)
Text and Data Mining valid from 2019-05-14
Received: 1 October 2018
Accepted: 2 May 2019
First Online: 14 May 2019
Ethics approval and consent to participate
: Ethical approval for the Understanding Society nurse visit was obtained from the National Research Ethics Service (Reference: 10/H0604/2). Participants gave written consent for blood sampling.
: Not applicable.
: The authors declare that they have no competing interests.
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