Polycythemia VeraPolycythemiaPrimary MyelofibrosisThrombocythemia, EssentialJanus Kinase 2Myeloproliferative DisordersJanus KinasesPyrazolesPipobromanThrombocytosisSplenomegalyErythroid Precursor CellsAloeErythropoietinPhlebotomyJanus Kinase 1Receptors, ThrombopoietinErythropoiesisProtein Kinase InhibitorsGranulocytesThrombocytopeniaReceptors, ErythropoietinThrombosisHydroxyureaBloodlettingHematocritMutation, MissenseHematopoiesis, ExtramedullaryErythroid CellsMutationClinical Trials, Phase III as TopicAmino Acid SubstitutionIntention to Treat AnalysisGPI-Linked ProteinsPlatelet CountDrug ApprovalClinical Trials, Phase I as TopicMegakaryocytesColony-Forming Units AssayBudd-Chiari SyndromeIsoantigensLeukemia, Myeloid, Chronic, Atypical, BCR-ABL NegativeChromosomes, Human, 19-20ThrombopoietinBone MarrowHomozygoteHematopoietic Stem Cells