1. Cariology and Operative Dentistry, Graduate School of Restorative Sciences, Tokyo Medical and Dental University, Tokyo, Japan,
2. Department of Restorative Dentistry, University of Washington School of Dentistry, Seattle, WA, USA,
3. Department of Operative Dentistry, Division of Oral Functional Science and Rehabilitation, School of Dentistry, Asahi University, Mizuho, Japan,
4. Department for Advanced Dental Research, Center of Advanced Medicine for Dental and Oral Diseases, National Center for Geriatrics and Gerontology, Obu, Japan