title: The Sydney System: endoscopic division. Endoscopic appearances in gastritis/duodenitis.
authors.affiliation: Department of Gastroenterology, Academic Medical Centre, Amsterdam, The Netherlands.
authors.forename: G N
authors.initials: GN
authors.lastname: Tytgat
mesh_terms: D004382:Duodenitis / Q000145:classification / Q000473:pathology*; D005756:Gastritis / Q000145:classification / Q000473:pathology*; D005773:Gastroscopy; D006801:Humans; D008722:Methods