Corresponding Author

Department of Gastroenterology and Hepatology, Tokyo Medical University, Tokyo, Japan

Department of Gastroenterology, Niiza Shiki Central General Hospital, Saitama, Japan

Corresponding author: Yoshihiro Furuichi, MD, PhD

Department of Gastroenterology and Hepatology, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo 160-0023, Japan

E-mail: furuichi@tokyo-med.ac.jp