title: A study of bronchogenic carcinoma.
mesh_terms: D000367:Age Factors; D000368:Aged; D002283:Carcinoma, Bronchogenic / Q000453:epidemiology*; D005260:Female; D006801:Humans; D007194:India; D008175:Lung Neoplasms / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D012737:Sex Factors; D012907:Smoking