Herlev and Gentofte Universtity Hospital - Department of Cardiology, Odense University Hospital - Department of Cardiology, University of Copenhagen - Department of Clinical Medicine, Bispebjerg and Frederiksberg University Hospital - Department of Cardiology, Bispebjerg and Frederiksberg University Hospital - Department of Cardiology, University of Copenhagen - Department of Clinical Medicine, University of Copenhagen - The Heart Center, University of Copenhagen - Department of Clinical Medicine, Herlev and Gentofte Universtity Hospital - Department of Cardiology, University of Copenhagen - Rigshospitalet, Department of Cardiology, Zealand University Hospital - Department of Cardiology, University of Copenhagen - Section of Biostatistics, Herlev and Gentofte University Hospital - Department of Clinical Physiology and Nuclear Medicine, University of Copenhagen - Department of Cardiology and University of Copenhagen - Department of Clinical Medicine