title: Reply.
authors.affiliation: Department of Gastroenterology, Yokohama City University Graduate School of Medicine, Yokohama, Japan.
authors.forename: Kento
authors.initials: K
authors.lastname: Imajo
authors.affiliation: Department of Gastroenterology, Yokohama City University Graduate School of Medicine, Yokohama, Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Nakajima