Polycythemia VeraPolycythemiaPlatelet CountBlood PlateletsPlatelet AggregationThrombocythemia, EssentialThrombocytosisThrombocytopeniaJanus Kinase 2Platelet AdhesivenessPrimary MyelofibrosisMyeloproliferative DisordersPlatelet TransfusionPlatelet Membrane GlycoproteinsBlood Cell CountPlatelet Factor 4ErythropoietinLeukocyte CountMegakaryocytesPurpura, Thrombocytopenic, IdiopathicPlatelet Function TestsPipobromanThrombopoietinReceptors, ThrombopoietinErythroid Precursor CellsHematocritThrombosisPlatelet Glycoprotein GPIIb-IIIa ComplexPlatelet Glycoprotein GPIb-IX ComplexPhlebotomyBleeding TimePlatelet Activating FactorErythropoiesisErythrocyte CountPurpura, ThrombocytopenicSplenectomyReceptors, ErythropoietinThrombinAntigens, Human PlateletFibrinogenThrombopoiesisAdenosine DiphosphateGranulocytesBloodlettingBone MarrowP-SelectinHemostasisVon Hippel-Lindau Tumor Suppressor ProteinHematologyCD4 Lymphocyte CountBlood CoagulationDisseminated Intravascular CoagulationHematopoiesis, ExtramedullaryHemoglobinsvon Willebrand FactorAspirinLeukocytosisHematopoiesisTime FactorsHemorrhageHydroxyureaHELLP SyndromeBlood Coagulation DisordersMutationErythrocyte VolumeProthrombin TimePlatelet Membrane Glycoprotein IIbSplenomegalyHomozygoteRetrospective StudiesSomatostatinomaRussiaHypersplenismErythrocyte IndicesTreatment OutcomeHematologic TestsBlood Coagulation TestsCell CountMutation, MissenseColony-Forming Units AssayGPI-Linked ProteinsHematopoietic Stem CellsThromboxane A2Recombinant ProteinsPlateletpheresisIsoantigensPartial Thromboplastin TimePlatelet ActivationPlatelet Factor 3CollagenAmino Acid SubstitutionHeparinBlood Coagulation FactorsPregnancy Complications, HematologicPlatelet Storage Pool DeficiencyProspective StudiesPlatelet-Rich PlasmaSerotoninThrombelastographyFlow Cytometry