1. Department of General Pathology, Pomeranian Medical University, 70-111 Szczecin, Poland
2. Department of Hematology and Bone Marrow Transplantation, Poznan University of Medical Sciences, 60-569 Poznań, Poland
3. Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, 70-111 Szczecin, Poland
4. Department of Hematology and Bone Marrow Transplantation, Medical University of Silesia, 40-027 Katowice, Poland