1. Department of Hematology, Copernicus Memorial Hospital, Medical University, Lodz, Poland;
2. German Cancer Research Center (DKFZ), Heidelberg, Germany;
3. Laboratory of Clinical and Transplant Immunology and Genetics, Copernicus Memorial Hospital, Lodz, Poland;
4. Department of Biology, University of Pisa, Pisa, Italy;
5. Department of Hematology and BMT, Silesian Medical University Hospital SPSKM, Katowice, Poland;
6. Department of Hematology, Specialist Hospital No. 1 in Bytom, Bytom, Poland;
7. Department of Cancer Prevention and Therapy, Wroclaw Medical University, Wroclaw, Poland;
8. Department and Clinic of Internal and Occupational Diseases and Hypertension, Wroclaw Medical University, Wroclaw, Poland;
9. Department of Haematology, Jagiellonian University Medical College, Cracow, Poland;
10. Department of Haematooncology and Bone Marrow Transplantation, Medical University of Lublin, Lublin, Poland;
11. Department of Hematology, Military Institute of Medicine, Warsaw, Poland;
12. Department of Hematology, Holycross Cancer Center, Kielce, Poland;
13. Department of Hematology, Copernicus Hospital, Torun, Poland;
14. Department of Lymphoid Malignancies, Maria Sklodowska-Curie Institute Oncology Centre, Warsaw, Poland;
15. Department of Hematology, University Hospital, Bydgoszcz, Poland;
16. Department of Haematology, Rydygier Memorial Hospital, Cracow, Poland;
17. Department of Oncological Propaedeutics, Medical University of Gdansk, Gdansk, Poland;
18. Gdynia Oncology Center, Gdynia, Poland;
19. Rzeszow Regional Hospital, Rzeszow, Poland;
20. Laboratory of Human Cancer Genetics, Centre of New Technologies, University of Warsaw, Warsaw, Poland;
21. Department of Hematology, Institute of Hematology and Transfusion Medicine, Warsaw, Poland