1. Department of Prosthodontics, Dental Research Institute, Dental and Life Sciences Institute, Education and Research Team for Life Science on Dentistry, School of Dentistry, Pusan National University, Yangsan, Republic of Korea.
2. Research and Development Institute, Samwon D.M.P, Yangsan, Republic of Korea.
3. Research and Development Institute, PNUAdd Co., Ltd., Busan, Republic of Korea.