Relative risk of pulmonary cancer in cigar and pipe smokers.
D000293:Adolescent; D000328:Adult; D000368:Aged; D006801:Humans; D008175:Lung Neoplasms / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012907:Smoking; D013557:Switzerland