1. From Mayo Clinic, Rochester (P.F.), and Medtronic, Mounds View (A.E.T., C.W., S.W.) — both in Minnesota; King’s College Hospital, London (F.M.); the Cardiology Department, St. Antonius Hospital, Nieuwegein (L.V.A.B.), and Amsterdam University Medical Centers, Amsterdam (L.V.A.B., R.E.K.) — both in the Netherlands; London Health Sciences Centre, London, ON, Canada (J.M.); Austin Hospital, Heidelberg, VIC, Australia (D.O.); Northwestern University, Evanston, IL (B.P.K.); Centre Hospitalier Régional...