LeukemiaLeukemia, Myeloid, AcuteLeukemia, Lymphocytic, Chronic, B-CellLeukemia, LymphoidLeukemia, ExperimentalLeukemia, Myelogenous, Chronic, BCR-ABL PositiveLeukemia Virus, MurinePrecursor Cell Lymphoblastic Leukemia-LymphomaLeukemia, T-CellLeukemia, Monocytic, AcuteMoloney murine leukemia virusLeukemia, Hairy CellLeukemia L1210Leukemia, B-CellLeukemia Virus, BovineLeukemia Virus, FelineGene Expression Regulation, LeukemicLeukemia, Radiation-InducedMyeloid-Lymphoid Leukemia ProteinChild WelfareLeukemia P388Leukemia, Biphenotypic, AcuteFriend murine leukemia virusDisabled ChildrenChild BehaviorHL-60 CellsAcute DiseaseLeukemia-Lymphoma, Adult T-CellCytarabineLeukemia, Megakaryoblastic, AcuteAKR murine leukemia virusFusion Proteins, bcr-ablRemission InductionLeukemia, Myeloid, Chronic-PhaseBone MarrowAntineoplastic AgentsPrecursor B-Cell Lymphoblastic Leukemia-LymphomaDaunorubicinKaryotypingTumor Cells, CulturedLeukemia, Plasma CellLeukemia, Myeloid, Accelerated PhaseK562 CellsTreatment OutcomeLeukemia, Prolymphocytic, T-CellHuman T-lymphotropic virus 1Cell LineChild Health ServicesLeukemia, ProlymphocyticChild RearingAsparaginaseCore Binding Factor Alpha 2 SubunitNeoplasm ProteinsPrognosisLeukemia, Myelomonocytic, JuvenilePrecursor T-Cell Lymphoblastic Leukemia-LymphomaBase SequenceLeukemic InfiltrationLeukemia, Basophilic, AcuteMolecular Sequence DataRecurrenceChild, Institutionalizedfms-Like Tyrosine Kinase 3Philadelphia ChromosomeAntineoplastic Combined Chemotherapy ProtocolsLymphomaChromosome AberrationsChild Behavior DisordersApoptosisChild PsychologyLeukemia, Myeloid, Chronic, Atypical, BCR-ABL NegativeGraft vs Leukemia EffectAbelson murine leukemia virusPreleukemiaImmunophenotypingBone Marrow TransplantationLeukemia Inhibitory Factor Receptor alpha SubunitTime FactorsNeoplasm, ResidualChild of Impaired ParentsCytogenetic AnalysisLeukemia, Large Granular LymphocyticRetroviridaeFlow CytometryCell DifferentiationDental Care for ChildrenMutationDrug Resistance, NeoplasmChild, OrphanedParentsNeoplastic Stem CellsHematopoietic Stem CellsCell Line, TumorRetroviridae InfectionsOxidesAge FactorsGene Products, taxGene RearrangementIdarubicinRetrospective Studies