[1] Univ Hull, Dept Cardiol, Kingston Upon Hull, Yorks, England
[2] Univ Glasgow, Cardiovasc Res Ctr, British Heart Fdn, Glasgow, Lanark, Scotland
[3] Rigshosp, Oslo, Norway
[4] Med Ctr Alkmaar, Alkmaar, Netherlands
[5] Amphia Ziekenhuis, Breda, Netherlands
[6] Hosp S Francisco Xavier, Lisbon, Portugal
[7] Inst Heart & Lung Dis, Gothenburg, Sweden
[8] Inst Cardiol, Warsaw, Poland
[9] AstraZeneca, Dept Biostat, Molndal, Sweden
[10] Nelson R Mandela Sch Med, Durban, South Africa
[11] Univ Med Ctr Groningen, NL-9713 AV Groningen, Netherlands
[12] Univ Gothenburg, Gothenburg, Sweden
[13] Nord Sch Publ Hlth, Gothenburg, Sweden
[14] Wallenberg Lab Cardiovasc Res, Gothenburg, Sweden