title: Abdominal aortic aneurysms: comparison of patients treated with and without operation.
mesh_terms: D000328:Adult; D000368:Aged; D001012:Aorta, Abdominal / Q000601:surgery; D001014:Aortic Aneurysm / Q000150:complications / Q000401:mortality / Q000601:surgery*; D005500:Follow-Up Studies; D006322:Heart Aneurysm / Q000150:complications; D006801:Humans; D008722:Methods; D008875:Middle Aged; D011656:Pulmonary Emphysema / Q000150:complications