title: Aortic incompetence: a comparative aetiological study of two patient groups.
mesh_terms: D000328:Adult; D001022:Aortic Valve Insufficiency / Q000145:classification / Q000209:etiology*; D006349:Heart Valve Diseases / Q000145:classification*; D006801:Humans; D008875:Middle Aged; D012214:Rheumatic Heart Disease / Q000145:classification*