Primary MyelofibrosisMyeloproliferative DisordersJanus Kinase 2Polycythemia VeraChronic DiseaseUrticariaThrombocythemia, EssentialHematopoiesis, ExtramedullaryIntestinal Pseudo-ObstructionThrombocytosisEtretinatePurpura, ThrombocytopenicMegakaryocytesPurpura, Thrombocytopenic, IdiopathicBone MarrowPolycythemiaReceptors, ThrombopoietinConstipationPolyneuropathiesBasophil Degranulation TestAntigens, CD34SplenectomyPlatelet CountJaundice, Chronic IdiopathicDanazolAngioedemaSplenomegalyManometryAutoantibodiesBasophilsSkin TestsNeutropeniaReticulinIdiopathic Pulmonary Fibrosis