1. Department of Cardiology, Copenhagen University Hospital—Bispebjerg and Frederiksberg , 2000 Copenhagen , Denmark
2. Department of Medicine, Drammen Hospital, Vestre Viken Trust, Institute of Behavioural Medicine, University of Oslo , 3004 Drammen , Norway
3. Department of Cardiology, Oslo University Hospital Ulleval, and University of Oslo , 0450 Oslo , Norway
4. Department of Regional Health Research, University of Southern Denmark, and Department of Internal Medicine 1, Holbæk Hospital , 4300 Holbæk , Denmark
5. Department of Cardiology, Zealand University Hospital Roskilde , 4000 Roskilde , Denmark
6. Department of Cardiology, Vestfold Hospital Trust , 3103 Tonsberg , Norway
7. Section of Biostatistics, Department of Public Health, University of Copenhagen , 1353 Copenhagen , Denmark
8. Oslo Centre for Biostatistics and Epidemiology, Oslo University Hospital , 0317 Oslo , Norway
9. Department of Cardiology, Copenhagen University Hospital–North Zealand Hospital , 3400 Hillerød , Denmark