1. Oncology, Oslo University Hospital, Oslo, Norway;
2. Oncology, Uppsala University Hospital, Uppsala, Sweden;
3. Oncology, Skåne University Hospital, Lund, Sweden;
4. Hematology, Copenhagen University Hospital, Copenhagen, Denmark;
5. Hematology, Helsinki University Hospital, Helsinki, Finland;
6. Positron Emission Tomography and Cyclotron Unit, Copenhagen University Hospital, Copenhagen, Denmark;
7. Nuclear Medicine, Oslo University Hospital, Oslo, Norway;
8. Hematology, Karolinska University Hospital, Solna, Sweden;
9. Hematology, Herlev University Hospital, Herlev, Denmark;
10. Oncology, St. Olavs University Hospital, Trondheim, Norway;
11. Hematology, Sahlgrenska University Hospital, Gothenburg, Sweden;
12. Oncology, Haukeland University Hospital, Bergen, Norway;
13. Pathology, Uppsala University Hospital, Uppsala, Sweden;
14. Pathology, Helsinki University Hospital, Helsinki, Finland;
15. Clinical Pathology, Copenhagen University Hospital, Copenhagen, Denmark;
16. Clinical Pathology, Skåne University Hospital, Lund, Sweden;
17. Pathology, Oslo University Hospital, Oslo, Norway;
18. Hematology, Aarhus University Hospital, Aarhus, Denmark;
19. Nuclear Medicine, Helsinki University Hospital, Helsinki, Finland;
20. Nuclear Medicine, Uppsala University Hospital, Uppsala, Sweden; and
21. Hematology, Odense University Hospital, Odense, Denmark