1. Department of Pediatrics, Graduate School of Medicine Tohoku University Sendai Japan
2. Division of Orthodontics and Dentofacial Orthopedics Graduate School of Dentistry, Tohoku University Sendai Japan
3. Young Dental Clinic Ulsan South Korea
4. Minamihara Sakai Orthodontic Office Nagano Japan
5. Department of Pediatrics Sendai City Hospital Sendai Japan
6. Department of Biomaterials and Bioengineering Faculty of Dental Medicine, Hokkaido University Sapporo Japan