Polycythemia VeraPolycythemiaMyeloproliferative DisordersHematocritThrombocythemia, EssentialJanus Kinase 2HemoglobinsPrimary MyelofibrosisThrombocytosisPipobromanErythropoietinReceptors, ThrombopoietinErythroid Precursor CellsHemoglobin AHemoglobins, AbnormalPhlebotomyAloeErythropoiesisGranulocytesHematopoiesis, ExtramedullaryHydroxyureaSplenomegalyFetal HemoglobinLeukemia, Myeloid, Chronic, Atypical, BCR-ABL NegativeHemoglobin, SickleBloodlettingMutationReceptors, ErythropoietinThrombosisBone MarrowMutation, MissenseBone Marrow NeoplasmsPlatelet CountMegakaryocytesHematopoietic Stem CellsAmino Acid SubstitutionErythroid CellsLeukemia, Myelogenous, Chronic, BCR-ABL PositiveMyelodysplastic-Myeloproliferative DiseasesColony-Forming Units AssayAnemiaHemoglobin CBudd-Chiari SyndromeThrombopoietinLeukocytosisLeukemia, Myelomonocytic, ChronicErythrocytesGPI-Linked ProteinsErythrocyte CountChromosomes, Human, 19-20Erythrocyte VolumeBlood ViscosityOxyhemoglobinsHematopoiesisValineHomozygoteSTAT5 Transcription FactorHemoglobin A, GlycosylatedHemodilutionIsoantigensHemoglobin ELeukemia, Myelomonocytic, JuvenileLeukemia, MyeloidHemoglobin A2Erythrocyte IndicesJanus KinasesPoint MutationSplenectomyHemoglobinometryLeukemia