[1] Hairmyres Hosp, Dept Cardiol, E Kilbride, Lanark, Scotland
[2] Monklands Hosp, Dept Cardiol, Airdrie, Lanark, Scotland
[3] Univ Glasgow, Western Infirm, Dept Cardiol, Glasgow G11 6NT, Lanark, Scotland
[4] Univ Glasgow, Div Immunol Infect & Inflammat, Glasgow Biomed Res Ctr, Glasgow G12 8QQ, Lanark, Scotland
[5] Leicester Royal Infirm, Dept Cardiovasc Sci, Leicester, Leics, England
[6] Leicester Natl Inst Hlth Res Cardiovasc, Biomed Res Unit, Leicester, Leics, England
[7] Univ Glasgow, BHF Cardiovasc Res Ctr, Glasgow G12 8QQ, Lanark, Scotland