[1] Univ Nottingham, Div Primary Care, Primary Care Stratified Med Grp, Nottingham, England
[2] Univ Nottingham, Div Epidemiol & Publ Hlth, Nottingham, England
[3] Univ Southampton, Fac Med Primary Care & Populat Sci, Southampton, Hants, England
[4] UCL, Cardiovasc Genet, Inst Cardiovasc Sci, London, England