title: Reply to Tan et al.
authors.affiliation: Division of Gastroenterology, Department of Medicine, Jichi Medical University, Tochigi, Japan.
authors.forename: Hironori
authors.initials: H
authors.lastname: Yamamoto
authors.affiliation: Division of Gastroenterology, Department of Medicine, Jichi Medical University, Tochigi, Japan.
authors.forename: Yoshimasa
authors.initials: Y
authors.lastname: Miura
authors.affiliation: Division of Gastroenterology, Department of Medicine, Jichi Medical University, Tochigi, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Shinozaki
authors.affiliation: Division of Gastroenterology, Department of Medicine, Jichi Medical University, Tochigi, Japan.
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Hayashi
authors.affiliation: Division of Gastroenterology, Department of Medicine, Jichi Medical University, Tochigi, Japan.
authors.forename: Hirotsugu
authors.initials: H
authors.lastname: Sakamoto
authors.affiliation: Department of Surgery, Jichi Medical University, Tochigi, Japan.
authors.forename: Alan Kawarai
authors.initials: AK
authors.lastname: Lefor