University of Copenhagen - Rigshospitalet, University of Copenhagen - Copenhagen University Hospital, University of Copenhagen - Rigshospitalet, University of Copenhagen - Rigshospitalet, University of Copenhagen - Department of Clinical Medicine, affiliation not provided to SSRN, Aarhus University, Aarhus University, Aarhus University, University of Copenhagen - Copenhagen University Hospital, University of Copenhagen - Rigshospitalet and University of Copenhagen - Rigshospitalet, Department of Cardiology