1. Associate Professor, Department of Orthodontics, Gangnam Severance Hospital, The Craniofacial Deformity Institute, College of Dentistry, Yonsei University, Seoul, South Korea.
2. Graduate Student, Department of Orthodontics, Graduate School of Dentistry, Yonsei University, Seoul, South Korea.
3. Assistant Professor, Department of Orthodontics, Gangnam Severance Hospital, The Craniofacial Deformity Institute, College of Dentistry, Yonsei University, Seoul, South Korea.
4. Professor and Chairman, Department of Orthodontics, Gangnam Severance Hospital, The Craniofacial Deformity Institute, College of Dentistry, Yonsei University, Seoul, South Korea.