Imatinib Completed Phase 1 / 2 Trials for Recurrent Adult Acute Lymphoblastic Leukemia / Blastic Phase Chronic Myelogenous Leukemia / Untreated Childhood Acute Lymphoblastic Leukemia / Relapsing Chronic Myelogenous Leukemia / Philadelphia Chromosome Positive Adult Precursor Acute Lymphoblastic Leukemia / Philadelphia Chromosome Positive Childhood Precursor Acute Lymphoblastic Leukemia / Childhood Chronic Myelogenous Leukemia / Accelerated Phase Chronic Myelogenous Leukemia / Recurrent Childhood Acute Lymphoblastic Leukemia / Chronic Myelogenous Leukemia, BCR-ABL1 Positive / Childhood Acute Lymphoblastic Leukemia in Remission / Untreated Adult Acute Lymphoblastic Leukemia / Chronic Phase Chronic Myelogenous Leukemia / Adult Acute Lymphoblastic Leukemia in Remission Treatment