Oncology: hematology, transplantation of blood stem cells (SZTs) into children, application of epigenetic modulators (histondeacetylase-Inhibitors, HDIs), use of donor-lymphoctes, development of methods for amplification of blood stem cells ex vivo before transplantation, use of natural killer cells in context to haploidental SZT methods, development of cultivation conditions for amplification of hemotopoetic stem cells, prenatal pathogenesis of acute lymphoblastic leukaemia.