[Clinical study of pH of gastric contents using radio-capsules].
D000328:Adult; D004381:Duodenal Ulcer / Q000378:metabolism; D005745:Gastric Acidity Determination / Q000295:instrumentation; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008722:Methods; D008875:Middle Aged; D013686:Telemetry / Q000295:instrumentation