1. Division of Orthodontics and Dentofacial Orthopedics
2. Division of Oral Ecology and Biochemistry; Tohoku University Graduate School of Dentistry; 4-1 Seiryo-machi Aoba-ku Sendai 980-8575
3. Division of Community Oral Health Science, Department of Community Medical Supports; Tohoku Medical Megabank Organization, Tohoku University; 2-1 Seiryo-machi Aoba-ku Sendai 980-8573, Japan