[1] 2nd Department of Internal Medicine, Med. Univ. of Lódź, Poznañ
[2] Department of Hematology, Academy of Medicine, Poznañ
[3] Inst. of Hematol. and Transfusiology, Warsaw
[4] Department of Hematology, Univ. Med. School of Gdańsk, Szczecin
[5] Department of Hematology, Institute of Internal Medicine, Pomorian Academy of Medicine, Szczecin
[6] Department of Hematology, Academy of Medicine, Wroclaw
[7] Department of Hematology, Academy of Medicine, Warsaw
[8] Department of Hematology, Silesian Academy of Medicine, Katowice
[9] Medical Research Center, Polish Academy of Sciences, Warsaw
[10] Department of Internal Medicine, Med. Univ. of Lódź, 93-513 Lódz