1. Department of Cardiology, Clinical Sciences Lund University, Skåne University Hospital Lund Sweden
2. Department of Cardiology Sahlgrenska University Hospital, Gothenburg University Gothenburg Sweden
3. Department of Cardiology Umeå University Umeå Sweden
4. Department of Cardiology Uppsala University Uppsala Sweden
5. Department of Clinical sciences, Danderyd Hospital Karolinska institutet Stockholm Sweden
6. Department of Medicine Huddinge, Karolinska Institutet Stockholm Sweden