LeukemiaLeukemia, LymphoidPrecursor Cell Lymphoblastic Leukemia-LymphomaLeukemia, Myeloid, AcuteAcute DiseaseLeukemia, MyeloidRemission, SpontaneousScalp DermatosesBone Marrow ExaminationBone MarrowInfectionBone Marrow TransplantationDown SyndromeCytarabineInfant, NewbornRecurrenceTransplantation, HomologousImmunophenotypingNeutropeniaAntineoplastic AgentsCase-Control StudiesLeukemia, Radiation-InducedRetrospective StudiesNuclear ReactorsRisk FactorsLeukemia, ExperimentalLeukemia, Lymphocytic, Chronic, B-CellLeukemia Inhibitory FactorLeukemia, Myelogenous, Chronic, BCR-ABL PositiveLeukemia, Monocytic, AcuteLeukemia Virus, BovineRadioactive Waste6-MercaptopurinePower PlantsDaunorubicinThioguanineLeukemia, Hairy CellAir Pollutants, RadioactiveLymphoma, Non-HodgkinLeukemia, T-CellLymphomaAsparaginaseLeukocyte CountBenzeneLeukemia, B-CellLeukemia L1210Paternal ExposureLeukemia, Neutrophilic, ChronicElectromagnetic FieldsLeukemia Virus, FelineLeukemia, Myelomonocytic, AcuteLeukemia, Prolymphocytic, T-CellNeoplasms, Radiation-InducedLeukemia Virus, MurineRauscher VirusLymphocytesUkrainePetroleumRosette FormationLeukemia-Lymphoma, Adult T-CellB-LymphocytesLeukemia, Plasma CellMethotrexateMoloney murine leukemia virusTumor Cells, CulturedLeukemia, Basophilic, AcuteLeukemia, Promyelocytic, AcuteGrowth InhibitorsHL-60 CellsLeukemia, Myelomonocytic, ChronicLeukemia P388NeoplasmsLeukemia, ProlymphocyticBenzamidesEnglandPrecursor T-Cell Lymphoblastic Leukemia-LymphomaLeukemia Inhibitory Factor Receptor alpha SubunitOccupational DiseasesRadioactive FalloutLeukemoid ReactionCentral Nervous System DiseasesTime FactorsOccupational ExposurePatient IsolatorsElectric WiringRailroadsVincristineTranslocation, GeneticSpace-Time ClusteringPyrimidinesIncidenceGreat BritainT-LymphocytesFriend murine leukemia virusFatal OutcomeChannel IslandsReceptors, Antigen, B-CellReceptors, OSM-LIFBlood Cell CountCell Line