1. Division of Neurosurgery, Nanpuh Hospital, Kagoshima, Japan
2. Division of Clinical Application, Nanpuh Hospital, Kagoshima, Japan
3. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan
4. Department of Gastroenterology and Hepatology, Tokai University School of Medicine, Isehara, Kanagawa, Japan