1. Emeritus Professor, Kyushu Dental University, Kitakyushu, Japan
2. Department of Health and Nutrition, Faculty of Applied Bioscience, Gifu University, Gifu, Japan
3. Division of Molecular Signaling and Biochemistry, Kyushu Dental University, Kitakyushu, Japan
4. Division of Community Oral Health Development, Kyushu Dental University, Kitakyushu, Japan
5. Department of Health and Nutrition, Sanyo-Gakuen College, Okayama, Japan