1. Department of Preventive Dentistry and Dental Public Health; School of Dentistry, Aichi-Gakuin University; Nagoya Japan
2. Division of Community Oral Health Development; Kyushu Dental University; Kitakyushu Japan
3. Department of Nutrition, Faculty of Home Economics; Kyushu Women's University; Kitakyushu Japan
4. Department of Health and Nutrition Care, Faculty of Allied Health Sciences; University of East Asia; Shimonoseki Japan
5. Department of Nutritional Sciences, Faculty of Health and Welfare; Seinan Jo Gakuin University; Kitakyushu Japan