1. Departments of Clinical and Experimental Cardiology (A.B., C.A.S., V.W., M.W.V., R.J.v.O., I.E., R.C.), Anatomy Embryology and Physiology (A.O.V.), and Medical Biochemistry (R.O., C.v.R., H.A.), Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands; and IHU Institut de Rythmologie et Modélisation Cardiaque, Fondation Bordeaux Université, Bordeaux, France (R.C.).