1. Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Osaka, Japan
2. Fracture and Reliability Research Institute, Graduate School of Engineering, Tohoku University, Miyagi, Japan
3. The Institute of Scientific and Industrial Research, Osaka University, Osaka, Japan
4. Department of Restorative Dentistry, Hokkaido University Graduate School of Dental Medicine, Hokkaido, Japan
5. KU Leuven (University of Leuven), Department of Oral Health Sciences, BIOMAT & UZ Leuven (University Hospitals Leuven), Dentistry, Leuven, Belgium