Affiliations

• ¹ Department of Gastroenterology, Sanraku Hospital, Tokyo, Japan.
• ² Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
• ³ Division of Endoscopy, Yokohama City University Medical Center, Kanagawa, Japan.
• ⁴ Department of Gastroenterology, National Hospital Organization Kyoto Medical Center, Kyoto, Japan.
• ⁵ Shinagawa Gut Clinic, Tokyo, Japan.
• ⁶ Department of Gastroenterology, NTT Medical Center Tokyo, Tokyo, Japan.
• ⁷ Center for Epidemiology and Preventive Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
• ⁸ Department of Gastroenterology, Chiba-Nishi General Hospital, Matsudo, Japan.
• ⁹ Department of Gastroenterology, Teikyo University School of Medicine, Tokyo, Japan.
• ¹⁰ Department of Gastroenterology and Hepatology, Graduate School of Medicine, Nagoya University, Nagoya, Japan.