1 From the Department of Cardiology, The Heart Centre (A.H.C., H.B., J.H.S.) and Department of Pathology (C.B.A.), Rigshospitalet, Copenhagen University Hospital, Denmark; The Danish National Research Foundation Centre for Cardiac Arrhythmia, Copenhagen, Denmark (A.H.C., J.H.S.); Institute of Sports Medicine, Molecular Genetics of Cardiovascular Disease, University Hospital Münster, Germany (B.S., M.B.); and Department of Clinical Medicine, Faculty of Medicine and Health Sciences, University of Copenhagen, Denmark (J.H.S.). alexhc@dadlnet.dk.
2 From the Department of Cardiology, The Heart Centre (A.H.C., H.B., J.H.S.) and Department of Pathology (C.B.A.), Rigshospitalet, Copenhagen University Hospital, Denmark; The Danish National Research Foundation Centre for Cardiac Arrhythmia, Copenhagen, Denmark (A.H.C., J.H.S.); Institute of Sports Medicine, Molecular Genetics of Cardiovascular Disease, University Hospital Münster, Germany (B.S., M.B.); and Department of Clinical Medicine, Faculty of Medicine and Health Sciences, University of Copenhagen, Denmark (J.H.S.).