[1] UCL, Inst Cardiovasc Sci, Hatter Cardiovasc Inst, 67 Chenies Mews, London WC1E 6HX, England
[2] Aarhus Univ Hosp, Dept Cardiol, Aarhus, Denmark
[3] MSD AS, Copenhagen V, Denmark
[4] Univ S Alabama, Dept Physiol, Coll Med, Mobile, AL USA
[5] Addenbrookes Hosp, Dept Cardiovasc Med, Cambridge, England
[6] Univ Essen Gesamthsch, Sch Med, West German Heart & Vasc Ctr, Inst Pathophysiol, Essen, Germany
[7] Ctr Nacl Invest Cardiovasc Carlos III CNIC, Madrid, Spain
[8] UCL, Ctr Clin Pharmacol, London, England
[9] Univ Hosp Aachen, Dept Anesthesiol, Aachen, Germany
[10] Univ Lyon, Ctr Rech Cancerol Lyon, Lyon, France
[11] Cincinnati Childrens Hosp, Inst Heart, Dept Pediat Cardiol, Cincinnati, OH USA