Polycythemia VeraPolycythemiaHematocritThrombocythemia, EssentialHemoglobinsJanus Kinase 2Primary MyelofibrosisMyeloproliferative DisordersPipobromanThrombocytosisErythropoietinHemoglobin AErythroid Precursor CellsHemoglobins, AbnormalAloePhlebotomyErythropoiesisReceptors, ThrombopoietinFetal HemoglobinHemoglobin, SickleBloodlettingGranulocytesReceptors, ErythropoietinHydroxyureaThrombosisAnemiaHemoglobin CPlatelet CountMutationErythroid CellsMutation, MissenseHematopoiesis, ExtramedullaryErythrocyte CountErythrocytesErythrocyte VolumeAmino Acid SubstitutionBlood ViscosityGPI-Linked ProteinsOxyhemoglobinsColony-Forming Units AssayHemoglobin A, GlycosylatedHemodilutionBone MarrowMegakaryocytesHemoglobin EBudd-Chiari SyndromeHomozygoteIsoantigensHemoglobin A2Erythrocyte IndicesLeukemia, Myeloid, Chronic, Atypical, BCR-ABL NegativeChromosomes, Human, 19-20SplenomegalyHematopoietic Stem CellsHemoglobinometryThrombopoietinOxygen