1. Department of Cardiology, The Heart Center, Copenhagen University Hospital Rigshospitalet , Copenhagen , Denmark
2. Department of Cardiology, Copenhagen University Hospital Herlev and Gentofte , Hellerup , Denmark
3. Statens Serum Institut , Copenhagen , Denmark
4. The Danish Heart Foundation , Copenhagen , Denmark
5. Department of Clinical Medicine, Faculty of Health and Sciences, University of Copenhagen , Copenhagen , Denmark