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. Department of Periodontics and Oral Medicine; University of Michigan School of Dentistry; Ann Arbor Michigan USA
4. Division of Oral Science for Health Promotion; Department of Oral Health and Welfare; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
5. Oral Rehabilitation; Niigata University Medical and Dental Hospital; Niigata Japan