[1] Univ Sch Med, Dept Hyg, Lublin, Poland
[2] Univ Sch Med, Dept Clin Immunol, Lublin, Poland
[3] Univ Sch Med, Dept Nephrol, Lublin, Poland
[4] Ctr Natl Rech Sci, Unite Propre Rech No 9002, Inst Iol Mol & Cellula, Strasbourg, France
[5] Univ Sch Med, Dept Hyg, Lublin, France
[6] Schering AG, Div Warsaw, Warsaw, Poland
[7] Univ Sch Med, Dept Haematol, Lublin, Poland