1. Department of Cardiology, Clinical Sciences, Lund University, Lund, Sweden
2. Örebro University, Faculty of Health, Department of Cardiology, Örebro, Sweden
3. Department of Cardiology, Linköping University Hospital, Linköping, Sweden
4. Karolinska Institutet, Department of Medicine Huddinge, Sweden
5. National Heart Centre Singapore, 5 Hospital Drive, Singapore
6. Department of Cardiology, Clinical Science and Education, Södersjukhuset, Stockholm, Sweden
7. Department of Clinical Sciences, Danderyds University Hospital, Karolinska Institutet, Stockholm, Sweden
8. Cardiovascular Division, Brigham and Women's Hospital, Boston, Massachusetts