[1] Univ Pecs, Dept Pathol, Fac Med, Med Ctr, H-7624 Pecs, Hungary
[2] Univ Pecs, Med Ctr, Dept Pediat Oncol, H-7624 Pecs, Hungary
[3] Univ Debrecen, Med Ctr, Dept Pediat Oncol, H-4012 Debrecen, Hungary
[4] Univ Szeged, Med Ctr, Dept Pediat Oncol, Szeged, Hungary
[5] Borsod Cty Teaching Hosp, Child Welf Ctr, Dept Hematol, Miskolc, Hungary