1. Private practice
2. Department of Orthodontics; The Institute of Craniofacial Deformity; Yonsei University College of Dentistry; Seoul Korea
3. Department of Mechanical engineering; College of Engineering; Yonsei University; Seoul Korea
4. Department of Periodontology; Research Institute for Periodontal Regeneration; Yonsei University College of Dentistry
5. Department of Orthodontics; Gangnam Severance Dental Hospital; The Institute of Craniofacial Deformity; Yonsei University College of Dentistry