1. Department of Orthodontics, Nagasaki University School of Dentistry, 1-7-1, Sakamoto, Nagasaki 852-8588, Japan
2. Department of Pharmacology, Nagasaki University School of Dentistry, 1-7-1, Sakamoto, Nagasaki 852-8588, Japan
3. Department of Oral and Maxillofacial Surgery, Nagasaki University School of Dentistry, 1-7-1, Sakamoto, Nagasaki 852-8588, Japan