1. Department of Cardiology, The Cardiovascular Research Centre, Herlev and Gentofte Hospital, University of Copenhagen , Hospitalsvej 1, 2900 Hellerup , Denmark
2. Department of Cardiology, The Heart Centre, Rigshospitalet, University of Copenhagen, Blegdamsvej 3B , 2100 Copenhagen , Denmark
3. Cardiovascular Division, Brigham & Women’s Hospital, 75 Francis St , Boston, MA 02115 , USA