| Affiliation: | 1. Department of Gastroenterology and Hepatology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, , Okayama, Japan;2. Department of Gastroenterology, Okayama City Hospital, , Okayama, Japan;3. Department of Preventive Dentistry, Institute of Health Biosciences, The University of Tokushima Graduate School, , Tokushima, Japan;4. Department of Preventive Dentistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, , Okayama, Japan;5. Health Service Center, Okayama University, , Okayama, Japan |
