title: Bowel preparation, the first step for a good quality colonoscopy.
authors.affiliation: Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
authors.forename: Ho-Su
authors.initials: HS
authors.lastname: Lee
authors.affiliation: Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
authors.forename: Jeong-Sik
authors.initials: JS
authors.lastname: Byeon