1. Department of Gastroenterology and Hepatology, Yamaguchi University Graduate School of Medicine
2. Yamaguchi University Health Administration Center
3. Department of Oncology and Laboratory Medicine, Yamaguchi University Graduate School of Medicine
4. Department of Human Nutrition Faculty of Nursing and Human Nutrition, Yamaguchi Prefectural University
5. Center of Research and Education for Regenerative Medicine, Yamaguchi University Graduate School of Medicine
6. Division of Gastroenterology and Hepatology, Graduate School of Medical and Dental Sciences, Niigata University