[1] Med Univ Warsaw, Hematol Oncol & Internal Dis, Warsaw, Poland
[2] Med Univ Warsaw, Dept Neurol, Warsaw, Poland
[3] Med Univ Silesia, Sch Med Katowice, Dept Hematol & Bone Marrow Transplantat, Katowice, Poland
[4] Natl Hlth Fund, Cent Off, Warsaw, Poland