1. Division of Oral Rehabilitation, Department of Clinical Oral Molecular Biology, Faculty of Dental Science, Kyushu University, Fukuoka 812-8582, Japan.
2. Division of Oral Health, Growth, and Development, Department of Orthodontics, Faculty of Dental Science, Kyushu University, Fukuoka 812-8582, Japan.
3. Department of First Anatomy, National Defense Medical College, Tokorozawa 359-0042, Japan.
4. Department of Oral and Maxillofacial Radiology, Faculty of Dental Science, Kyushu University, Fukuoka 812-8582, Japan.