1. Department of Hematology; Medical University of Lodz; Lodz; Poland
2. Department of Hematology; Institute of Hematology and Transfusion Medicine; Warsaw; Poland
3. Department of Hematology; City Hospital; Torun; Poland
4. Department of Hematology and Bone Marrow Transplantation; Silesian Medical University; Katowice; Poland
5. Department of Hematology; Medical University; Bialystok; Poland
6. Department of Hematooncology and Bone Marrow Transplantation; Medical University; Lublin; Poland
7. Department of Hematology; University of Medical Sciences; Poznan; Poland
8. Department of Hematology, Oncology and Internal Diseases; Warsaw Medical University; Warsaw; Poland
9. Department of Hematology, Blood Neoplasms and Bone Marrow Transplantation; Wroclaw Medical University; Wroclaw; Poland
10. Department of Hematology and Transplantology; Medical University of Gdansk; Gdansk; Poland
11. Department of Hematology; Jagiellonian University; Krakow; Poland
12. Department of Internal Medicine; Military Institute of Medicine; Warsaw; Poland
13. Department of Hematology and Internal Diseases; Strus Hospital; Poznan; Poland