1. Department of Prosthodontics, Dental Research Institute, Institute of Translation Dental Science, School of Dentistry, Pusan National University, Yangsan, Republic of Korea.
2. Department of Prosthodontics, Seoul National University Gwanak Dental Hospital, Seoul, Republic of Korea.
3. BK21 PLUS Project, School of Dentistry, Pusan National University, Yangsan, Republic of Korea.
4. Department of Prosthodontics, In-Je University Haeundae Paik Hospital, Busan, Republic of Korea.