1 Departments of Gastroenterology and Nephrology, Chiba University, Chiba, Japan.
2 Division of Gastroenterology, Showa University Fujigaoka Hospital, Yokohama, Japan.
3 Emergency and Critical Care Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan.
4 Yokohama City University School of Medicine, Yokohama, Japan.
5 Department of Gastroenterology and Hepatology, Iwate Medical University, Morioka, Japan.
6 Department of Digestive and Lifestyle Related Disease, Health Research Course, Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan.
7 Division of Gastroenterology and Hepatology, Department of Internal Medicine, Faculty of Medicine, Saitama Medical University, Moroyama, Japan.
8 Kagoshima City Hospital, Kagoshima, Japan.
9 Department of Medicine, Teikyo University School of Medicine, Tokyo, Japan.