1. From the Department of Cardiology, St. Antonius Hospital, Nieuwegein, the Netherlands (F.K., J.K., A.B., M.P., F.E., M.S., B.R., J.V.d.H.)
2. Department of Cardiology, Academic Medical Center, Amsterdam, the Netherlands (J.V., B.B., J.B.)
3. Department of Cardiology, University Medical Center, Groningen, the Netherlands (R.S., T.H., P.V.d.H.)
4. Department of Cardiology, Amphia Hospital, Breda, the Netherlands (B.V.d.B.)
5. Department of Cardiology, Evanston Hospital, NorthShore University Health System, IL (T.F.).