[1] UCL, Inst Cardiovasc Sci, London, England
[2] Natl Ctr Cardiovasc Prevent & Outcomes, Inst Cardiovasc Sci, London, England
[3] Great Ormond St Hosp Sick Children, North East Thames Reg Genet Serv, London, England
[4] Univ Glasgow, Cardiovasc Res Ctr, British Heart Fdn Glasgow, Inst Cardiovasc & Med Sci, Glasgow, Lanark, Scotland
[5] Univ Bristol, MRC, Integrat Epidemiol Unit, Bristol, Avon, England
[6] Univ Bristol, Sch Social & Community Med, Bristol, Avon, England
[7] UCL, Genet Epidemiol Grp, Inst Cardiovasc Sci, London, England