1. Department of Orthodontics, School of Dentistry, Chonbuk National University, Jeonju, Korea.
2. Institute of Oral Biosciences, School of Dentistry, Chonbuk National University, Jeonju, Korea.
3. Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital, Jeonju, Korea.