title: pH 4.0.
authors.affiliation: Department of Medicine, Gastroenterological Section, St. Olav's Hospital, Trondheim, Norway. reidar.fossmark@ntnu.no
authors.forename: Reidar
authors.initials: R
authors.lastname: Fossmark
authors.forename: Eiliv
authors.initials: E
authors.lastname: Brenna
authors.forename: Helge L
authors.initials: HL
authors.lastname: Waldum
mesh_terms: D050782:Esophageal pH Monitoring; D004942:Esophagitis, Peptic / Q000378:metabolism* / Q000503:physiopathology; D005744:Gastric Acid / Q000378:metabolism; D005764:Gastroesophageal Reflux / Q000378:metabolism* / Q000503:physiopathology; D006801:Humans; D006863:Hydrogen-Ion Concentration