1. Department of Periodontology, College of Dentistry and Institute of Oral Bioscience, Jeonbuk National University, Jeonju, Korea.
2. Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Korea.
3. Research & Development Center, MegaGen Implant Co., Ltd., Daegu, Korea.
4. Department of Periodontology, Gangnam Severance Hospital, College of Dentistry, Yonsei University, Seoul, Korea.