[1] Charles Univ Prague, Fac Med 1, Inst Biochem & Expt Oncol, Prague 12853 2, Czech Republic
[2] Charles Univ Prague, Fac Med 1, Dept Hematol, Dept Med 1, Prague 12853 2, Czech Republic
[3] Gen Univ Hosp, Prague, Czech Republic
[4] Charles Univ Prague, Fac Med 3, Univ Hosp Kralovske Vinohrady, Dept Clin Hematol, Prague 12853 2, Czech Republic
[5] Charles Univ Prague, Fac Med 2, Motol Univ Hosp, Dept Pediat Hematol & Oncol,Dept Med Microbiol, Prague 12853 2, Czech Republic
[6] Natl Inst Publ Hlth, Toxicogen Unit, Prague, Czech Republic