title: Bronchopleural fistula--present-day study of an old problem. A review of 52 cases.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001983:Bronchial Fistula / Q000175:diagnosis / Q000209:etiology* / Q000401:mortality / Q000517:prevention & control; D006801:Humans