[1] Mendel Univ Brno, Fac Agron, Dept Chem & Biochem, CZ-61300 Brno, Czech Republic
[2] Charles Univ Prague, Sch Med 2, Dept Paediat Haematol & Oncol, CZ-15006 Prague 5, Czech Republic
[3] Univ Hosp Motol, CZ-15006 Prague 5, Czech Republic
[4] Charles Univ Prague, Sch Med 2, Dept Surg 1, CZ-15006 Prague 5, Czech Republic
[5] Charles Univ Prague, Fac Math & Phys, Dept Chem Phys & Opt, CZ-12116 Prague 2, Czech Republic
[6] German Canc Res Ctr, Natl Ctr Tumor Dis, Div Prevent Oncol, D-69120 Heidelberg, Germany
[7] Charles Univ Prague, Fac Sci, Dept Biochem, CZ-12840 Prague 2, Czech Republic