1. Department of Oral and Maxillofacial Surgery School of Medicine, Nara Medical University Kashihara Japan
2. Department of Clinical Oral Oncology Nagasaki University Graduate School of Biomedical Sciences Nagasaki Japan
3. Department of Oral and Maxillofacial Surgery Division of Surgery, Tokai University School of Medicine Isehara Japan
4. First Department of Oral and Maxillofacial Surgery Graduate School of Dentistry, Osaka University Osaka Japan
5. Department of Dentistry and Oral Surgery Shinshu University School of Medicine Matsumoto Japan
6. Department of Oral and Maxillofacial Surgery Kobe University Graduate School of Medicine Kobe Japan
7. Department of Clinical Oral Oncology Hokkaido Cancer Center Sapporo Japan