1. Department of Gastroenterology, Yamashita Hospital, Ichinomiya, Japan
2. Department of Occupational and Environmental Health, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya, Japan
3. Department of Nursing, Yamashita Hospital, Ichinomiya, Japan
4. Department of Clinical laboratory, Yamashita Hospital, Ichinomiya, Japan
5. Department of Gastroenterology and Hepatology, Nagoya University Graduate School of Medicine, Nagoya, Japan