[1] UCL, MRC Unit Lifelong Hlth & Ageing, London, England
[2] Univ Glasgow, Social & Publ Hlth Sci Unit, Glasgow, Lanark, Scotland
[3] Univ Edinburgh, Div Psychiat, Edinburgh, Midlothian, Scotland
[4] Univ Bristol, MRC Integrat Epidemiol Unit, Bristol, Avon, England
[5] Univ Bristol, Populat Hlth Sci, Bristol, Avon, England
[6] Bradford Teaching Hosp NHS Fdn Trust, Bradford Inst Hlth Res, Bradford, W Yorkshire, England
[7] UCL, Ctr Longitudinal Studies, London, England
[8] Univ Edinburgh, Inst Genet & Canc, Edinburgh, Midlothian, Scotland
[9] Univ Edinburgh, Med Informat Ctr, Edinburgh, Midlothian, Scotland