1. Department of Cardiology, Copenhagen University Hospital – Herlev and Gentofte , Gentofte Hospitalsvej 4, 2900 Hellerup , Denmark
2. Department of Cardiology, Copenhagen University Hospital – North Zealand Hospital , Dyrehavevej 29, 3400 Hillerød , Denmark
3. Brigham and Women's Hospital Heart & Vascular Center, Harvard Medical School , 75 Francis St, 02115 Boston, MA , USA
4. Department of Cardiology, Aalborg University Hospital , Hobrovej 18–22, 9000 Aalborg , Denmark
5. Department of Cardiology, Copenhagen University Hospital – Rigshospitalet , Blegdamsvej 9, 2100 Copenhagen , Denmark
6. Institute of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen , Blegdamsvej 3B, 2200 Copenhagen , Denmark
7. Department of Cardiology, Aarhus University Hospital , Skejby, Palle Juul-Jensens Boulevard 99, 8200 Aarhus , Denmark