1. Department of Cardiology, Sahlgrenska University Hospital, Gothenburg, Sweden
2. Department of Cardiology, Danderyd University Hospital, Stockholm, Sweden
3. Department of Cardiology, Skåne University Hospital, Lund, Sweden
4. Department of Cardiology, Karolinska University Hospital, Stockholm, Sweden
5. Department of Cardiology, Östersund Hospital, Östersund, Sweden
6. Division of Cardiology, Department of Clinical Science and Education, Karolinska Institutet, Södersjukhuset, Stockholm, Sweden
7. Department of Clinical Science and Education, Karolinska Institutet, Cardiology Capio Sankt Goran Hospital, Stockholm, Sweden
8. Department of Cardiothoracic Surgery, Sahlgrenska University Hospital, Gothenburg, Sweden