1. Department of Oral and Maxillofacial Surgery, School of Dental Medicine, Tsurumi University
2. Division of Oral Maxillofacial Surgery, Department of Reconstructive Oral and Maxillofacial Surgery, School of Dentistry, Iwate Medical University
3. Department of Oral and Maxillofacial Surgery, Saiseikai Yokohamashi Tobu Hospital
4. Department of Oral and Maxillofacial Surger y, The Kanagawa Prefectural Federation of Agricultural Cooperatives for Health and Welfare Sagamihara Kyodo Hospital
5. Department of Oral and Maxillofacial Surgery, Yokohama Rosai Hospital