1. Division of Internal Medicine, Department of Inflammatory Bowel Disease, Hyogo College of Medicine, Nishinomiya, Japan.
2. Department of Intestinal Inflammation Research, Hyogo College of Medicine, Nishinomiya, Japan.
3. Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan.
4. Department of Inflammatory Bowel Disease Surgery, Hyogo College of Medicine, Nishinomiya, Japan.