title: Letter: Coalworker's pneumoconiosis and carcinoma of the lung.
mesh_terms: D003032:Coal Mining; D004739:England; D006801:Humans; D008175:Lung Neoplasms / Q000453:epidemiology / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D011009:Pneumoconiosis / Q000150:complications*; D012907:Smoking / Q000150:complications