Polycythemia VeraPolycythemiaThrombocythemia, EssentialJanus Kinase 2Primary MyelofibrosisMyeloproliferative DisordersThrombocytosisErythropoietinPipobromanErythroid Precursor CellsPhlebotomyErythropoiesisReceptors, ErythropoietinHematocritReceptors, ThrombopoietinBloodlettingVon Hippel-Lindau Tumor Suppressor ProteinHematopoiesis, ExtramedullaryGranulocytesErythrocyte VolumeSomatostatinomaRussiaHomozygoteThrombosisGPI-Linked ProteinsHydroxyureaMutation, MissenseMutationAmino Acid SubstitutionIsoantigensCyanosisErythroid CellsPlatelet CountColony-Forming Units AssayMegakaryocytesParagangliomaErythrocyte IndicesBone MarrowLeukocytosisErythrocyte CountHeterozygoteBudd-Chiari SyndromeHemoglobinsHematopoietic Stem CellsAltitude SicknessSplenomegalyLeukemia, Myeloid, Chronic, Atypical, BCR-ABL NegativeChromosomes, Human, 19-20Thrombopoietin