title: A simplified technique for accurate placement of ambulatory pH probes.
authors.forename: K R
authors.initials: KR
authors.lastname: DeVault
authors.forename: D O
authors.initials: DO
authors.lastname: Castell
mesh_terms: D004947:Esophagus / Q000502:physiology*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008991:Monitoring, Physiologic / Q000379:methods*