1. Graduate student, Department of Orthodontics, School of Dentistry and Institute of Oral-Bioscience, Chonbuk National University, Korea.
2. Assistant Professor, Department of Orthodontics, School of Dentistry and Institute of Oral-Bioscience, Chonbuk National University, Korea.
3. Professor, Department of Orthodontics, School of Dentistry and Institute of Oral-Bioscience, Chonbuk National University, Korea.