1. Department of Metabolic Medicine, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
2. Department of Gastroenterology and Hepatology, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
3. Department of Diabetology, Saiseikai Kumamoto Hospital, Kumamoto, Japan
4. Department of Surgical Pathology, Kumamoto University, Kumamoto, Japan