title: Letter: Preoperative gastric secretory studies.
mesh_terms: D004322:Drainage; D004381:Duodenal Ulcer / Q000175:diagnosis / Q000601:surgery*; D005750:Gastric Juice / Q000378:metabolism*; D006632:Histamine; D006801:Humans; D008297:Male; D012008:Recurrence; D014628:Vagotomy
chemical_list: D006632:Histamine