title: Author's Reply.
authors.affiliation: Department of Gastroenterology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
authors.forename: Hoonsub
authors.initials: H
authors.lastname: So
authors.affiliation: Department of Applied Statistics, Gachon University, Seongnam, Korea.
authors.forename: Seungbong
authors.initials: S
authors.lastname: Han
authors.affiliation: Department of Gastroenterology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea.
authors.forename: Dong-Hoon
authors.initials: DH
authors.lastname: Yang