1. Heart Center, Department of Clinical and Experimental Cardiology (D.N.K., T.F.B., J.T.V., W.R.B., R.E.K., R.d.W., R.J.P.), and Department of Vascular Medicine (B.-J.H.v.d.B.), Academic Medical Center, University of Amsterdam, the Netherlands. Heart Center, Department of Cardiology, Onze Lieve Vrouwe Gasthuis, Amsterdam, the Netherlands (W.R.B.).