Polycythemia VeraPolycythemiaThrombocythemia, EssentialJanus Kinase 2Primary MyelofibrosisMyeloproliferative DisordersThrombocytosisErythropoietinPipobromanErythroid Precursor CellsPhlebotomyErythropoiesisReceptors, ErythropoietinHematocritReceptors, ThrombopoietinBloodlettingVon Hippel-Lindau Tumor Suppressor ProteinHematopoiesis, ExtramedullaryGranulocytesErythrocyte VolumeRussiaSomatostatinomaHomozygoteThrombosisMutationHydroxyureaGPI-Linked ProteinsMutation, MissenseAmino Acid SubstitutionIsoantigensPlatelet CountCyanosisErythroid CellsColony-Forming Units AssayBone MarrowMegakaryocytesErythrocyte CountLeukocytosisHemoglobinsParagangliomaErythrocyte IndicesHeterozygoteBudd-Chiari SyndromeHematopoietic Stem CellsAltitude SicknessSplenomegalyThrombopoietinHematologyLeukemia, Myeloid, Chronic, Atypical, BCR-ABL NegativeChromosomes, Human, 19-20