[1] Hosp Clin San Carlos, Inst Cardiovasc, Madrid, Spain
[2] Kings Coll Hosp NHS Fdn Trust, London, England
[3] Kings Coll London, BHF Ctr Excellence, Sch Cardiovasc Med & Sci, London, England
[4] Univ Melbourne, Dept Med, Melbourne, Vic, Australia
[5] Heart Ctr, Roslyn, NY USA
[6] Royal Brompton Hosp, London, England