SOME PROBLEMS OF LUNG CANCER.
D008175:Lung Neoplasms; D009369:Neoplasms / Q000453:epidemiology* / Q000209:etiology*; D012140:Respiratory Tract Diseases; D012907:Smoking
LUNG NEOPLASMS; NEOPLASM ETIOLOGY; NEOPLASM STATISTICS; RESPIRATORY TRACT DISEASES; SMOKING