Imatinib Recruiting Phase 3 Trials for Untreated Childhood Acute Lymphoblastic Leukemia / B Acute Lymphoblastic Leukemia With t(9;22)(q34.1;q11.2); BCR-ABL1 / Acute Lymphoblastic Leukaemias (ALL) / Minimal Residual Disease / BCR-ABL1 Fusion Protein Expression / Untreated Adult Acute Lymphoblastic Leukemia / T Acute Lymphoblastic Leukemia / Philadelphia Chromosome Positive Treatment