title: Essential thrombocythemia: an interim report from the Polycythemia Vera Study Group.
mesh_terms: D000328:Adult; D000368:Aged; D001853:Bone Marrow / Q000473:pathology; D005260:Female; D006400:Hematocrit; D006801:Humans; D008297:Male; D008875:Middle Aged; D010976:Platelet Count; D013920:Thrombocythemia, Essential / Q000175:diagnosis* / Q000503:physiopathology / Q000628:therapy