- Group 1 (for patients with no HLA-matched sibling donor): Patients receive remission-induction chemotherapy comprising idarubicin IV over 5 minutes on days 1, 3, and 5; cytarabine IV continuously over 24 hours on days 1-10; and gemtuzumab ozogamicin IV over 2 hours on day 7. Treatment continues for a second course in the absence of unacceptable toxicity.