1. From the Division of Electrophysiology (T.V.G., J.Z., G.R.), Hackensack University Medical Center, Hackensack, NJ; Duke Clinical Research Institute and Duke University School of Medicine (A.S.H., K.L.L.), Durham, NC; Brigham and Women’s Hospital and Harvard Medical School (M.O.S.), Boston, Mass; University Hospital (R.Y.), London, Ontario, Canada; Lankenau Hospital (R.M.), Wynnewood, Pa; Baystate Medical Center (J.C.), Springfield, Mass; Alamance Regional Medical Center (A.P.), Burlington, NC; Maine...