1. Department of Education and Support for Regional Medicine, Tohoku University Hospital, Japan
2. Division of Gastroenterology and Hepatobiliary Pancreatic Surgery, Tohoku Medical and Pharmaceutical University, Japan
3. Department of Psychosomatic Medicine, Tohoku University Hospital, Japan
4. Division of Psychosomatic Medicine, Tohoku Rosai Hospital, Japan
5. Department of Surgery, Tohoku University Graduate School of Medicine, Japan
6. Department of Behavioral Medicine, Tohoku University Graduate School of Medicine, Japan