[Choice of operation for patients with duodenal ulcers, based on gastric acid secretion patterns measured by a pH-meter].
D000328:Adult; D004381:Duodenal Ulcer / Q000601:surgery*; D005744:Gastric Acid / Q000378:metabolism*; D005745:Gastric Acidity Determination / Q000295:instrumentation*; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged