title: Accurate measurement of gastric acidity.
authors.forename: D O
authors.initials: DO
authors.lastname: Castell
mesh_terms: D004566:Electrodes; D005745:Gastric Acidity Determination / Q000295:instrumentation*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007441:Intubation, Gastrointestinal / Q000379:methods