title: A twenty-four hour pH monitoring instrument: an aid in the diagnosis of gastroesophageal reflux.
mesh_terms: D003201:Computers; D005764:Gastroesophageal Reflux / Q000175:diagnosis*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008838:Microcomputers; D008991:Monitoring, Physiologic / Q000295:instrumentation*