1. From the Department of Cardiovascular Diseases (F.J.A., Y.D., D.R.W.), Public Research Centre for Health (CRP-Santé), Luxembourg, Luxembourg; Center for Inherited Cardiovascular Disease (F.E.D., E.A.A.), Division of Cardiovascular Medicine, Stanford University, Stanford, CA; University of Antwerp (D.L.B.), Antwerp, Belgium; Division of Cardiology (D.R.W.), Centre Hospitalier, Luxembourg, Luxembourg.