title: Screening for lung cancer--where are we now?
mesh_terms: D006801:Humans; D008175:Lung Neoplasms / Q000453:epidemiology*; D008297:Male; D008403:Mass Screening / Q000191:economics / Q000379:methods / Q000592:standards / Q000639:trends*; D013902:Radiography, Thoracic; D013183:Sputum / Q000166:cytology