title: Polycythaemia study. A project of the Royal College of Physicians Research Unit. 1. Objectives, background and design.
mesh_terms: D000328:Adult; D000368:Aged; D001157:Arterial Occlusive Diseases / Q000209:etiology; D001810:Blood Volume; D001815:Bloodletting; D003328:Coronary Thrombosis / Q000209:etiology; D006400:Hematocrit; D006801:Humans; D002542:Intracranial Embolism and Thrombosis / Q000209:etiology; D008875:Middle Aged; D011086:Polycythemia / Q000150:complications* / Q000628:therapy; D011087:Polycythemia Vera / Q000150:complications; D012306:Risk