1. From the Departments of Cardiology (R.B.) and Pediatrics (J.A.T.), Baylor College of Medicine, Houston, Texas; the Arrhythmia Unit, Cardiovascular Institute, Hospital Clínic, University of Barcelona, Barcelona, Spain (J.B.); the Masonic Medical Research Laboratory, Utica, New York (C.A.); the Rammelkamp Center for Research, MetroHealth Campus, Case Western Reserve University, Cleveland, Ohio (G.E.K); the Cardiology Department, Casa Sollievo della Sofferenza, S. Giovani Rotondo, Italy (D.P.); and...