title: Response.
authors.affiliation: Digestive Disease Center and Research Institute, Department of Internal Medicine, SoonChungHyang University School of Medicine, Bucheon and Seoul, Korea.
authors.forename: Yun Nah
authors.initials: YN
authors.lastname: Lee
authors.affiliation: Digestive Disease Center and Research Institute, Department of Internal Medicine, SoonChungHyang University School of Medicine, Bucheon and Seoul, Korea.
authors.forename: Jong Ho
authors.initials: JH
authors.lastname: Moon
authors.affiliation: Digestive Disease Center and Research Institute, Department of Internal Medicine, SoonChungHyang University School of Medicine, Bucheon and Seoul, Korea.
authors.forename: Hyun Jong
authors.initials: HJ
authors.lastname: Choi