Hematopoietic Stem Cell TransplantationStem CellsStem Cell TransplantationBlood PlateletsPlatelet AggregationTransplantation, HomologousTransplantation, AutologousHematopoietic Stem CellsTransplantationHematologic NeoplasmsPlatelet CountGraft vs Host DiseaseEmbryonic Stem CellsPlatelet AdhesivenessAdult Stem CellsTransplantation ConditioningImmunocompromised HostCytomegalovirus InfectionsPeripheral Blood Stem Cell TransplantationTissue DonorsPluripotent Stem CellsTreatment OutcomePlatelet Membrane GlycoproteinsBone Marrow TransplantationGraft SurvivalOpportunistic InfectionsStem Cell NicheKidney TransplantationMycosesPlatelet TransfusionHistocompatibility TestingNeural Stem CellsImmunosuppressive AgentsAspergillosisInduced Pluripotent Stem CellsMesenchymal Stem Cell TransplantationCell DifferentiationRetrospective StudiesRoseolovirus InfectionsHematopoietic Stem Cell MobilizationTime FactorsTransplantsHistocompatibilityPlatelet Factor 4Multipotent Stem CellsCytomegalovirusMesenchymal Stromal CellsStem Cell FactorRecurrenceGraft RejectionHematologic DiseasesWhole-Body IrradiationMultiple MyelomaPlatelet Activating FactorAntifungal AgentsPlatelet Glycoprotein GPIIb-IIIa ComplexPlatelet Function TestsBusulfanAntiviral AgentsLeukemiaAntigens, CD34Cells, CulturedTransplantation ChimeraFlow CytometryCell LineageHepatic Veno-Occlusive DiseaseCord Blood Stem Cell TransplantationFatal OutcomePlatelet Glycoprotein GPIb-IX ComplexHerpesvirus 6, HumanCombined Modality TherapyGanciclovirBK VirusSurvival RateAnemia, AplasticSalvage TherapyZygomycosisStem Cell ResearchSurvival AnalysisThrombinRisk FactorsPolyomavirus InfectionsCyclosporineAcute DiseasePlant StemsBone Marrow CellsFetal Stem CellsLeukemia, Myelogenous, Chronic, BCR-ABL PositiveFollow-Up StudiesImmunosuppressionProspective StudiesHeart TransplantationLymphoproliferative DisordersCell ProliferationAntineoplastic Combined Chemotherapy ProtocolsPrecursor Cell Lymphoblastic Leukemia-LymphomaTriazolesMyeloablative AgonistsLeukemia, Myeloid, AcuteNeoplasms