Gastric analysis in the absence of demonstrable gastric pathology.
D005260:Female; D005745:Gastric Acidity Determination; D005750:Gastric Juice / Q000378:metabolism*; D005753:Gastric Mucosa / Q000378:metabolism*; D005767:Gastrointestinal Diseases / Q000175:diagnosis / Q000503:physiopathology*; D006801:Humans; D008297:Male; D012189:Retrospective Studies; D013270:Stomach / Q000503:physiopathology