1. Department of Cardiology, Sahlgrenska University Hospital, Sweden
2. Department of Cardiology, Clinical Sciences, Lund University, Sweden
3. Department of Cardiology, Örebro University, Sweden
4. Department of Cardiology, Karolinska University Hospital, Sweden
5. Department of Clinical Science and Education, Karolinska Institutet, Sweden
6. Department of Cardiology, Östersund Hospital, Sweden
7. Department of Medical Sciences and Uppsala Clinical Research Center, Uppsala University, Sweden