1. Department of Orthodontics, Nihon University School of Dentistry, Chiyoda-ku, Tokyo, Japan.
2. Department of Biochemistry, Nihon University School of Dentistry, Chiyoda-ku, Tokyo, Japan.
3. Division of Functional Morphology, Dental Research Center, Nihon University School of Dentistry, Chiyoda-ku, Tokyo, Japan.
4. Division of Clinical Research, Dental Research Center, Nihon University School of Dentistry, Chiyoda-ku, Tokyo, Japan.