title: Nicotine-induced exacerbation of duodenal ulcer.
mesh_terms: D000328:Adult; D004381:Duodenal Ulcer / Q000139:chemically induced*; D006801:Humans; D008297:Male; D009538:Nicotine / Q000009:adverse effects*; D012008:Recurrence
chemical_list: D009538:Nicotine