Letter: Coffee, cigarettes and peptic ulcer.
D000328:Adult; D003069:Coffee / Q000009:adverse effects*; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D010437:Peptic Ulcer / Q000453:epidemiology / Q000209:etiology*; D012907:Smoking / Q000150:complications*; D013997:Time Factors
D003069:Coffee