1. Department of Nursing, Faculty of Nursing, Gifu Kyoritsu University, 5-50, Kitagata-cho, Ogaki, 503-8550, Japan.
2. Department of Gastroenterology and Hepatology, Ogaki Municipal Hospital, Ogaki, Japan.
3. Department of Imaging Diagnosis, Ogaki Municipal Hospital, Ogaki, Japan.
4. Department of Gastroenterology and Hepatology, Nagoya University Graduate School of Medicine, Nagoya, Japan.
5. Department of Internal Medicine, Japanese Red Cross Himeji Hospital, Himeji, Japan.
6. Department of Epidemiology, Infectious Disease Control, and Prevention, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima, Japan.