[Multichannel pH measurement of the upper portion of the gastrointestinal tract].
D000136:Acid-Base Equilibrium; D004068:Digestive System Physiological Phenomena; D005215:Fasting; D005767:Gastrointestinal Diseases / Q000503:physiopathology; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008297:Male; D008722:Methods
Mnogokanal'naia pH-metriia verkhnogo otdela zheludochno--kishechnogo trakta