title: Role of radiation therapy in bronchogenic carcinoma.
mesh_terms: D000368:Aged; D002283:Carcinoma, Bronchogenic / Q000532:radiotherapy*; D018288:Carcinoma, Small Cell / Q000532:radiotherapy; D002294:Carcinoma, Squamous Cell / Q000532:radiotherapy; D006801:Humans; D008175:Lung Neoplasms / Q000532:radiotherapy*; D008875:Middle Aged; D011379:Prognosis