1. Department of Cardiology, Herlev & Gentofte Hospital, University of Copenhagen, Kildegårdsvej 28, Copenhage Denmark
2. Cardiovascular Medicine Division, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, 75 Francis St, Boston, MA, USA
3. Institute of Clinical Medicine, Faculty of Health Sciences, University of Copenhagen, Blegdamsvej 3B, Copenhagen N., Denmark