[1] Univ Glasgow, BHF Glasgow Cardiovasc Res Ctr, Glasgow G12 8TA, Lanark, Scotland
[2] Univ Glasgow, Dept Publ Hlth, Fac Med, Glasgow G12 8TA, Lanark, Scotland
[3] Univ Liverpool, Dept Publ Hlth, Liverpool L69 3BX, Merseyside, England
[4] Informat Serv Div, Edinburgh, Midlothian, Scotland
[5] Baker Heart Res Inst, Melbourne, Vic, Australia
[6] Univ Aberdeen, Ctr Acad Primary Care, Aberdeen, Scotland