Polycythemia VeraPolycythemiaHematocritThrombocythemia, EssentialHemoglobinsJanus Kinase 2Primary MyelofibrosisMyeloproliferative DisordersPipobromanThrombocytosisErythropoietinHemoglobin AErythroid Precursor CellsHemoglobins, AbnormalAloePhlebotomyErythropoiesisReceptors, ThrombopoietinFetal HemoglobinHemoglobin, SickleBloodlettingGranulocytesReceptors, ErythropoietinHydroxyureaThrombosisAnemiaHemoglobin CPlatelet CountMutationErythroid CellsMutation, MissenseHematopoiesis, ExtramedullaryErythrocyte CountErythrocyte VolumeAmino Acid SubstitutionErythrocytesBlood ViscosityGPI-Linked ProteinsOxyhemoglobinsColony-Forming Units AssayHemoglobin A, GlycosylatedHemodilutionMegakaryocytesBone MarrowHemoglobin EBudd-Chiari SyndromeHomozygoteHemoglobin A2IsoantigensErythrocyte IndicesLeukemia, Myeloid, Chronic, Atypical, BCR-ABL NegativeChromosomes, Human, 19-20SplenomegalyHemoglobinometryHematopoietic Stem CellsThrombopoietinOxygen