1. From the Institute of Cardiology (G.B., M.B.), University of Bologna, Bologna, Italy; Cardiology (G.L.B.), S. Anna Hospital, Como, Italy; Cardiology (L.P.), University of Florence, Florence, Italy; Cardiology (M.S., R.R.), S. Filippo Neri Hospital, Rome, Italy; Cardiology (A.C.), University of Marche-Ancona, Ancona, Italy; Cardiology (M.G.), Garibaldi-Nesima Hospital, Catania, Italy; Medtronic Italia (T.D.S.), Sesto S. Giovanni, Italy; Medtronic BRC (G.C.), Maastricht, the Netherlands; and the...