1. Department of Prosthodontics, School of Dentistry, Jeonbuk National University, Research Institute of Clinical Medicine of Jeonbuk National University - Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Republic of Korea.
2. Department of Dentistry, Daejeon Konyang Medical Center, Konyang University, School of Medicine, Daejeon, Republic of Korea.