1. Department of Hematology, Medical University of Lodz, Lodz, Poland;
2. Department of Hematooncology and Bone Marrow Transplantation, Medical University of Lublin, Lublin, Poland;
3. Department of Hematology and BMT, Medical School of Silesia, Katowice, Poland;
4. Department of Cancer Prevention, School of Public Health, Medical University of Silesia, Katowice, Poland;
5. Department of Hematology, Municipal Hospital, Chorzow, Poland;
6. Hematology Department, Rydygier Memorial Hospital, Krakow, Poland;
7. Department of Hematology, Medical University Hospital, Bialystok, Poland;
8. Hematology Department, Hospital MSWiA, Olsztyn, Poland;
9. Department of Hematology, Transplantation Medical University of Gdansk, Gdansk, Poland;
10. Department of Hematology, Blood Neoplasm and Bone Marrow Transplantation, Wroclaw, Poland;
11. Department of Hematology, Institute of Hematology and Transfusion Medicine, Warsaw, Poland;
12. Department of Hematology and Transfusion Medicine, Centre of Postgraduate Medical Education, Warsaw, Poland;
13. Department of Bone Marrow Transplantation and Onco-Hematology, Maria Sklodowska-Curie Institute – Cancer Center, Gliwice Branch, Gliwice, Poland