[Plasma secretin levels and gastric pH after a meal].
D000328:Adult; D004435:Eating; D005744:Gastric Acid / Q000378:metabolism*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008297:Male; D008875:Middle Aged; D011863:Radioimmunoassay; D012633:Secretin / Q000097:blood*
D012633:Secretin