 AML Relapsed defined as 5 leukemic blasts in the bone marrow after receiving up to 2 prior induction regimens, i.e., first or second relapse; Refractory defined as 5 leukemic blasts in the bone marrow to not more than 1 prior induction regimen defined as failure to achieve a CR or CRp following induction therapy, i.e., up to 1 induction failure. 