1. Patient Flow Management Center Okayama City Hospital Okayama Japan
2. Okayama Dental Hygienists' Association Okayama Japan
3. Division of Hospital Dentistry Okayama University Hospital Okayama Japan
4. Department of Surgery Okayama City Hospital Okayama Japan
5. Okayama Dental Association Okayama Japan
6. Department of Gastroenterology Okayama City Hospital Okayama Japan