The study compares the effectiveness of two doses of cytarabine combined with set doses of daunomycin and etoposide as an initial course of chemotherapy to eliminate minimal residual disease. Subsequent therapy is tailored according to cytogenetic risk features, assessments of minimal residual disease, and availability of a suitable donor for bone marrow transplant. Patients with higher risk disease features are given more intense therapy. For higher risk groups, transplant is given to patients with suitable donors.