1. Seoul Hansmile Dental Clinic
2. Department of Dental Education, Dental and Life Science Institute, School of Dentistry, Pusan National University, Dental Research Institute
3. Department of Prosthodontics and Dental Research Institute, School of Dentistry, Seoul National University
4. Department of Conservative Dentistry, Dental and Life Science Institute, School of Dentistry, Pusan National University, Dental Research Institute
5. Department of Conservative Dentistry and Dental Research Institute, School of Dentistry, Seoul National University