1. Division of Preventive Dentistry; Graduate School of Medical and Dental Sciences; Niigata University; Niigata Japan
2. Division of Oral Epidemiology and Dental Public Health; Department of Preventive and Restorative Dental Sciences; University of California San Francisco School of Dentistry; San Francisco CA USA
3. Division of Oral Science for Health Promotion; Niigata University Graduate School of Medical and Dental Sciences; Niigata Niigata Japan
4. Department of Community Oral Health Development; Kyushu Dental University; Kitakyushu Fukuoka Japan