1. Department of Prosthodontics, Chonnam National University, Gwangju, Korea
2. Biomedical Sciences Graduate Program (BMSGP), Chonnam National University, Hwasun, Korea
3. Department of Periodontology, Chonnam National University, Gwangju, Korea
4. Department of Laboratory Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea