1. Division of Preventive Dentistry; Department of Oral Health Science; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
2. Division of Community Oral Health Development; Kyushu Dental University; Kitakyushu Japan
3. Division of Oral Science for Health Promotion; Department of Oral Health and Welfare; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
4. Division of Comprehensive Prosthodontics; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
5. Chiba Prefectural University of Health Sciences; Chiba Japan
6. Toyo University; Itakura Japan
7. Institute of Fitness and Sports in Kanoya; Kanoya Japan