title: Primary pulmonary hypertension--a long term follow-up.
mesh_terms: D000328:Adult; D005500:Follow-Up Studies; D006439:Hemodynamics; D006801:Humans; D006973:Hypertension / Q000000981:diagnostic imaging* / Q000503:physiopathology; D008297:Male; D011379:Prognosis; D011859:Radiography