[1] Univ Lausanne Hosp, Serv Cardiol, Lausanne, Switzerland
[2] Univ Campania Luigi Vanvitelli, Monaldi Hosp, Dept Traslat Med Sci, Inherited & Rare Cardiovasc Dis Unit, Naples, Italy
[3] St Orsola Marcello Malpighi Hosp, Serv Cardiol, Bologna, Italy
[4] Careggi Univ Hosp, Cardiomyopathy Unit, Florence, Italy
[5] UCL, Inst Cardiol Sci, Ctr Heart Muscle Dis, London, England
[6] St Bartholomews Hosp, London, England
[7] Great Ormond St Hosp Sick Children, Ctr Inherited Cardiovasc Dis, Great Ormond St, London, England