Funding for this research was provided by:
Economic and Social Research Council (ES/M008591/1)
European Research Council (ERC-2010-StG Grant 263501)
Text and Data Mining valid from 2018-06-27
Received: 18 June 2017
Accepted: 4 June 2018
First Online: 27 June 2018
Ethics approval and consent to participate
: Research involving human subjects was performed in accordance with the Declaration of Helsinki. Approval from the National Research Ethics Service was obtained for data collection (Oxfordshire A REC, Reference: 10/H0604/2). As agreed with the respective ethics committees, consent was obtained from all participants included in the study; verbal consent was given to take part in the interview and for the physical measures, while written consent was provided for the blood samples.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.