Department of Gastroenterology and Hepatology, Sapporo Medical University School of Medicine, Minami 1-Jo Nishi 16-Chome, Chuo-ku, Sapporo, Hokkaido, 060-8543, Japan. tomoya.iida.0306@gmail.com.Department of Gastroenterology and Hepatology, Sapporo Medical University School of Medicine, Minami 1-Jo Nishi 16-Chome, Chuo-ku, Sapporo, Hokkaido, 060-8543, Japan.Department of Gastroenterology and Hepatology, Sapporo Medical University School of Medicine, Minami 1-Jo Nishi 16-Chome, Chuo-ku, Sapporo, Hokkaido, 060-8543, Japan.Department of Gastroenterology and Hepatology, Sapporo Medical University School of Medicine, Minami 1-Jo Nishi 16-Chome, Chuo-ku, Sapporo, Hokkaido, 060-8543, Japan.Department of Gastroenterology and Hepatology, Sapporo Medical University School of Medicine, Minami 1-Jo Nishi 16-Chome, Chuo-ku, Sapporo, Hokkaido, 060-8543, Japan.Department of Gastroenterology and Hepatology, Sapporo Medical University School of Medicine, Minami 1-Jo Nishi 16-Chome, Chuo-ku, Sapporo, Hokkaido, 060-8543, Japan.Department of Gastroenterology and Hepatology, Sapporo Medical University School of Medicine, Minami 1-Jo Nishi 16-Chome, Chuo-ku, Sapporo, Hokkaido, 060-8543, Japan.Department of Gastroenterology and Hepatology, Sapporo Medical University School of Medicine, Minami 1-Jo Nishi 16-Chome, Chuo-ku, Sapporo, Hokkaido, 060-8543, Japan.