[1] Univ Zurich, Ctr Mol Cardiol, Wagistr 12, CH-8952 Schlieren, Switzerland
[2] Natl Hlth Serv, Dis Registrat & Anal Serv, London, England
[3] Univ Leicester, Dept Cardiovasc Sci, Leicester, England
[4] Karolinska Inst, Dept Clin Sci, Stockholm, Sweden
[5] Royal Brompton & Harefield Hosp, Imperial Coll, London, England
[6] Kings Coll London, London, England
[7] Univ Hosp Zurich, Dept Res & Educ, Zurich, Switzerland