1. Department of Prosthodontics, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand.
2. Department of Removable Partial Prosthodontics, Division of Oral Health Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan.
3. Department of Oral Biomaterials Engineering, Tokyo Medical and Dental University (TMDU), Tokyo, Japan.
4. Department of Basic Oral Health Engineering, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan.
5. Liaison Center for Innovative Dentistry, Tohoku University Graduate School of Dentistry, Miyagi, Japan.