1. Department of Medicine, Section of Hematology and Coagulation, Sahlgrenska University Hospital, Gothenburg, Sweden;
2. Rigshospitalet and University of Copenhagen, Copenhagen, Denmark;
3. Avdelning for blodsykdommer, St. Olavs Hospital, Norwegian University of Science and Technology, Trondheim, Norway;
4. Department of Hematology, Skane University Hospital, Lund, Sweden;
5. North Estonian Regional Hospital, Tallinn, Estonia;
6. Department of Medicine, Turku University Central Hospital, Turku, Finland;
7. Landspitali University Hospital, Reykjavik, Iceland;
8. Department of Hematology, Odense University Hospital, Odense, Denmark;
9. Department of Hematology, Linkoping University Hospital, Linkoping, Sweden;
10. University North Norway, Tromso, Norway;
11. Norrlands University Hospital, Umea, Sweden;
12. Oslo University Hospital, Oslo, Norway;
13. Aalborg Sygehus, Aalborg, Denmark;
14. Center of Hematology, Karolinska Institute, Stockholm, Sweden;
15. Stavanger University Hospital, Stavanger, Norway;
16. Akademiska University Hospital, Uppsala, Sweden;
17. Karolinska Institutet/Karolinska University Hospital Huddinge, Stockholm, Sweden;
18. Haukeland Hospital, Bergen, Norway;
19. Department of Hematology, Aarhus University Hospital, Aarhus, Denmark; and
20. Department of Hematology and Coagulation, Skane University Hospital, Malmo, Sweden