1. aPrivate practice, Seoul, South Korea
2. bResearch Assistant, Department of Orthodontics, The Catholic University of Korea, Seoul, South Korea
3. cAssistant Professor, Department of Orthodontics, The Catholic University of Korea, Seoul, South Korea
4. dAssociate Professor and Department Chair, Department of Orthodontics, The Catholic University of Korea, Seoul, South Korea
5. eAdjunct Professor, Department of Orthodontics, University of Ferrara, LaSpezia, Italy