1 From the Laboratory of Experimental Cardiology, Department of Cardiology, Heart Lung Center Leiden, Leiden University Medical Center, The Netherlands (I.F., L.V., R.M., A.T., M.J.S., A.V.P., A.A.F.d.V., D.A.P.); and Department of Physics and Astronomy, Ghent University, Belgium (A.V.P.).