1. Oral health/Brain health/Total health Research Center Faculty of Dental Science Kyushu University Fukuoka Japan
2. Section of Geriatric Dentistry and Perioperative Medicine in Dentistry Division of Maxillofacial Diagnostic and Surgical Sciences Faculty of Dental Science Kyushu University Fukuoka Japan
3. Section of Geriatric Dentistry Department of General Dentistry Fukuoka Dental College Fukuoka Japan
4. Division of General Dentistry Nippon Dental University Hospital Tokyo Japan
5. Department of Nursing Fukuoka Nursing College Fukuoka Japan