1. From the Departments of Cardiology (I.K., J.W.J.) and Endocrinology and Metabolic Diseases (P.C.N.R.), and Einthoven Lab for Experimental Vascular Medicine (P.C.N.R., J.W.J.), Leiden University Medical Center, Leiden, The Netherlands; Durrer Center for Cardiogenetic Research, Amsterdam, The Netherlands (J.W.J.); and the Interuniversity Cardiology Institute (ICIN), Utrecht, The Netherlands (J.W.J.).