Evaluation of the safety and efficacy of 3 x 10, 3 x 12 or 3 x 14 g/m² Treosulfan resp.,
combined with 5 x 30 mg/m² fludarabine prior to allogeneic, hematopoietic stem cell
transplantation of patients with hematological malignancies, but non-eligible to standard
conditioning treatment.