title: Comparison of peroral versus ultrathin transnasal endoscopy in the diagnosis of upper gastrointestinal pathology.
authors.affiliation: Department of Gastroenterology, Riyadh Armed Forces Hospital, Riyadh, Saudi Arabia.
authors.forename: M A
authors.initials: MA
authors.lastname: Al-Karawi
authors.forename: F M
authors.initials: FM
authors.lastname: Sanai
authors.forename: A
authors.initials: A
authors.lastname: Al-Madani
authors.forename: H
authors.initials: H
authors.lastname: Kfoury
authors.forename: M I
authors.initials: MI
authors.lastname: Yasawy
authors.forename: A
authors.initials: A
authors.lastname: Sandokji