title: Campylobacter-like organisms and gastric ulcer.
mesh_terms: D000700:Analgesics / Q000627:therapeutic use; D002167:Campylobacter / Q000302:isolation & purification*; D006801:Humans; D012907:Smoking; D013276:Stomach Ulcer / Q000382:microbiology*
chemical_list: D000700:Analgesics