Naoki Minami1, Takuya Yoshino1, Hiroshi Nakase2. 1. Department of Gastroenterology and Hepatology, Graduate School of Medicine, Kyoto University, Kyoto, Japan. 2. Department of Gastroenterology and Hepatology, Graduate School of Medicine, Kyoto University, Kyoto, Japan. Electronic address: hiropy_n@kuhp.kyoto-u.ac.jp.