1. From Division of Cardiology, Beth Israel Deaconess Medical Center, Boston, MA (J.S.); Service de Cardiologue du CHU de Nantes, CHU de Nantes, Hôpital Nord, Nantes, France (V.P.); Molecular Cardiology, IRCCS Fondazione Salvatore Maugeri, Pavia, Italy (A.M., C.N., S.G.P.); Dipartimento di Medicina, Molecolare Università di Pavia, Pavia, Italy (S.G.P.); Division of Cardiology, Casa di Cura Pederzoli, Peschiera del Garda, Verona, Italy (P.D.); Arrhythmia Unit, Cardiovascular Surgery and Cardiology...