Very high risk pediatric/young adult patients with acute myeloid leukemia (AML): Patients =<  years, however, are eligible with (M marrow) with =< % blasts in marrow after having failed one or more cycles of chemotherapy; this group of patients will be analyzed separately
Very high risk pediatric patients with AML: Patients <  years, however, are eligible with (M marrow) with < % blasts in marrow after having failed one or more cycles of chemotherapy
Very high risk pediatric patients with AML; patients <  years, however, are eligible with (M marrow) with < % blasts in marrow after having failed one or more cycles of chemotherapy; this group of patients will be analyzed separately
Very high risk pediatric patients with AML: patients <  years, however, are eligible with (M marrow) with < % blasts in marrow after having failed one or more cycles of chemotherapy