Polycythemia VeraPolycythemiaMinnesotaThrombocythemia, EssentialHospitals, Group PracticeJanus Kinase 2Primary MyelofibrosisMyeloproliferative DisordersThrombocytosisErythropoietinPipobromanErythroid Precursor CellsRetrospective StudiesPhlebotomyErythropoiesisReceptors, ErythropoietinFollow-Up StudiesOutpatient Clinics, HospitalHematocritReceptors, ThrombopoietinArizonaTreatment OutcomeBloodlettingRisk FactorsHumeral HeadVon Hippel-Lindau Tumor Suppressor ProteinCohort StudiesPrimary DysautonomiasHematopoiesis, ExtramedullaryUrachusMMPIAmbulatory Care FacilitiesGranulocytesPrognosisTime FactorsRussiaErythrocyte VolumeSomatostatinomaHomozygoteCase-Control StudiesMonoclonal Gammopathy of Undetermined SignificanceThrombosisMutation, MissenseMutationGPI-Linked ProteinsHydroxyureaSurvival AnalysisSurvival RateFloridaBreast ImplantsParaproteinemiasDental ClinicsAmyloidosisDisease ProgressionProspective StudiesAmino Acid SubstitutionIsoantigensPredictive Value of TestsPostoperative ComplicationsCyanosisErythroid CellsPlatelet CountMedical Records Systems, ComputerizedColony-Forming Units AssayIncidenceAcademic Medical CentersMegakaryocytesErythrocyte IndicesBone MarrowParagangliomaAge FactorsHeterozygoteLeukocytosisHemoglobinsUnited StatesErythrocyte CountPain ClinicsBudd-Chiari SyndromeAtrophyElbow JointNatural Language ProcessingProportional Hazards ModelsRisk AssessmentHematopoietic Stem CellsSeverity of Illness IndexAltitude SicknessAngioplasty, Balloon, CoronarySplenomegalyPrevalenceQuestionnairesHospital MortalityAge of OnsetLeucovorinReoperationLeukemia, Myeloid, Chronic, Atypical, BCR-ABL NegativeChromosomes, Human, 19-20ThrombopoietinKaplan-Meier EstimateGenotype