1. Division of Oral and Maxillofacial Surgery, Department of Oral Medicine and Surgery Tohoku University Graduate School of Dentistry Sendai Miyagi Japan
2. Department of Oral and Maxillofacial Surgery, Faculty of Medicine University of Miyazaki Miyazaki Japan
3. Division of Oral Pathology, Department of Oral Medicine and Surgery Tohoku University Graduate School of Dentistry Sendai Miyagi Japan