1. Department of Haematology; Rigshospitalet; Copenhagen Denmark
2. Department of Oncology; Oslo University Hospital; Oslo Norway
3. Department of Oncology; Lund University Hospital; Lund Sweden
4. Department of Haematology; Helsinki University Central Hospital; Helsinki Finland
5. Department of Oncology; Uppsala University Hospital; Uppsala Sweden
6. Clinical Epidemiology Unit; Department of Medicine Solna; Karolinska Institute; Stockholm Sweden
7. Department of Haematology; Karolinska Institute; Stockholm Sweden
8. Department of Haematology; Aarhus University Hospital; Aarhus Denmark
9. Department of Oncology and Radiotherapy; Oulu University Hospital; Oulu Finland
10. Section of Haematology and Coagulation Medicine; Sahlgrenska University Hospital; Gothenburg Sweden
11. Department of Pathology; Lund University Hospital; Lund Sweden
12. Department of Genetics and Pathology; Uppsala University Hospital; Uppsala Sweden
13. Department of Pathology; Oslo University Hospital; Oslo Norway
14. Department of Pathology; Helsinki University Central Hospital; Helsinki Finland
15. Department of Systems Biology; Technical University of Denmark; Lyngby Denmark
16. Department of Health Sciences; University of Copenhagen; Copenhagen Denmark