1. Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU)
2. Department of Operative Dentistry, Division of Oral Functional Science and Rehabilitation, School of Dentistry, Asahi University
3. Department of Restorative Dentistry and Periodontology, University Hospital of Munich, Ludwig-Maximilians-University
4. Faculty of Dentistry, University of Hong Kong