1. Department of Cardiology, University Medical Center Utrecht, The Netherlands (S.A.G., R.J.H.).
2. Heart Center, Department of Clinical and Experimental Cardiology, Amsterdam UMC, University of Amsterdam, Cardiovascular Sciences, The Netherlands (M.H.v.d.R., A.A.M.W., P.G.P.).
3. Department of Cardiology, University Medical Center Groningen, The Netherlands (B.A.M.).
4. Department of Cardiology, St. Antonius Hospital, Nieuwegein, The Netherlands (J.B.).