title: Rectal Retroflexion during Colonoscopy: A Bridge over Troubled Water.
authors.affiliation: Department of Gastroenterology, Gachon University Gil Medical Center, Gachon University of Medicine and Science, Incheon, Korea.
authors.forename: Kwang An
authors.initials: KA
authors.lastname: Kwon
authors.affiliation: Digestive Disease Center, CHA Bundang Medical Center, CHA University, Seongnam, Korea.
authors.forename: Ki Baik
authors.initials: KB
authors.lastname: Hahm