LeukemiaLeukemia, Myeloid, AcuteLeukemia, Lymphocytic, Chronic, B-CellLeukemia, LymphoidLeukemia, ExperimentalLeukemia, Myelogenous, Chronic, BCR-ABL PositiveLeukemia Virus, MurinePrecursor Cell Lymphoblastic Leukemia-LymphomaChild WelfareDisabled ChildrenChild BehaviorLeukemia, T-CellLeukemia, Monocytic, AcuteMoloney murine leukemia virusLeukemia, Hairy CellLeukemia L1210Leukemia, B-CellLeukemia Virus, BovineLeukemia Virus, FelineGene Expression Regulation, LeukemicLeukemia, Radiation-InducedChild Health ServicesMyeloid-Lymphoid Leukemia ProteinChild RearingChild, InstitutionalizedLeukemia P388Child Behavior DisordersChild PsychologyLeukemia, Biphenotypic, AcuteAcute DiseaseChild of Impaired ParentsFriend murine leukemia virusDental Care for ChildrenCytarabineChild, OrphanedHL-60 CellsLeukemia-Lymphoma, Adult T-CellParentsLeukemia, Megakaryoblastic, AcuteRemission InductionAKR murine leukemia virusFusion Proteins, bcr-ablBone MarrowTreatment OutcomeLeukemia, Myeloid, Chronic-PhaseAntineoplastic AgentsPrecursor B-Cell Lymphoblastic Leukemia-LymphomaChild Nutrition DisordersChild LanguageChild Nutritional Physiological PhenomenaAge FactorsDaunorubicinKaryotypingChild MortalityTumor Cells, CulturedLeukemia, Plasma CellLeukemia, Myeloid, Accelerated PhaseK562 CellsTime FactorsRisk FactorsRetrospective StudiesPrognosisFollow-Up StudiesRecurrenceLeukemia, Prolymphocytic, T-CellAsparaginaseMothersCell LineHuman T-lymphotropic virus 1Leukemia, ProlymphocyticCore Binding Factor Alpha 2 SubunitNeoplasm ProteinsBase SequenceLeukemia, Myelomonocytic, JuvenileMolecular Sequence DataPrecursor T-Cell Lymphoblastic Leukemia-LymphomaAntineoplastic Combined Chemotherapy ProtocolsLeukemic InfiltrationInfant, NewbornLeukemia, Basophilic, AcuteLymphomaChromosome AberrationsPhiladelphia ChromosomeProspective Studiesfms-Like Tyrosine Kinase 3Parent-Child RelationsPrevalenceApoptosisBone Marrow TransplantationLeukemia, Myeloid, Chronic, Atypical, BCR-ABL NegativeImmunophenotypingGraft vs Leukemia EffectAbelson murine leukemia virusNeoplasm, ResidualCross-Sectional StudiesPreleukemiaLeukemia Inhibitory Factor Receptor alpha SubunitCase-Control StudiesMutationCytogenetic Analysis