1. Department of Cardiology, North Zealand Hospital, Hilleroed, Denmark
2. Department of Cardiology, North Zealand Hospital, Hilleroed, Denmark; Brigham and Women’s Hospital Heart and Vascular Center, Harvard Medical School, Boston, MA
3. Cardiology Section, Department of Internal Medicine, Holbaek Hospital, Holbaek, Denmark
4. Brigham and Women’s Hospital Heart and Vascular Center, Harvard Medical School, Boston, MA