1. Jagiellonian University Medical College Department of Haematology; Cracow Poland
2. Karolinska University Hospital; Stockholm Sweden
3. Tel Aviv Medical Centre; Tel Aviv Israel
4. Azienda Ospedaliera Universitaria Senese; Siena Italy
5. Weill Cornell Medical College; New York NY USA
6. Department of Haematology; Medical University of Lodz, Copernicus Memorial Hospital; Lodz Poland
7. University Hospital Olomouc; Olomouc Czech Republic
8. Department of Medicine; Vejle Hospital; Vejle Denmark
9. UAMS Myeloma Institute; Little Rock AR USA
10. Medical University; Warsaw Poland
11. Department of Haematology; State Hospital; Opole Poland
12. Department of Haematology; State Hospital; Kraków Poland
13. Wroclaw Medical University; Wroclaw Poland
14. Ministry of the Interior Hospital in Olsztyn with Warmia and Masuria Oncology Centre; Olsztyn Poland
15. Department of Haematology; State Hospital; Olsztyn Poland
16. Pomeranian Medical University; Szczecin Poland
17. Department of Haematology and Bone Marrow Transplantation; Poznan University of Medical Sciences; Poznan Poland
18. Department of Cancer Prevention; School of Public Health, Medical University of Silesia; Katowice Poland
19. Copernicus. Regional Oncology Centre; Gdańsk Poland
20. Department of Haematology; District Hospital in Torun; Toruń Poland
21. John Theurer Cancer Center, Hackensack University Medical Center; Hackensack NJ USA
22. Dana-Farber Cancer Institute, Harvard Medical School; Boston MA USA