Design and Methods Efficacy and safety of G-CSF as an adjunct to de novo AML remission induction therapy was assessed in this prospective randomized Phase III multicenter trial. Patients were randomized to receive induction therapy consisting of either cytosine arabinoside 100mg/m2/d, days 1-10 and idarubicin 12 mg/m2/d, days 1-3 (control arm) or plus G-CSF (Filgrastim, 5 µg/kg/d starting from day 8 until absolute neutrophil count (ANC) over 0.5x109/L for two consecutive days) for a median duration of 14 days (G-CSF arm).