1. Department of Oral and Maxillofacial Surgery, Shimane University Faculty of Medicine
2. Division of Oral and Maxillofacial Surgery, Hamada Medical Center
3. Division of Oral and Maxillofacial Surgery, Oki Regional Hospital
4. Division of Oral and Maxillofacial Surgery, Masuda Red Cross Hospital
5. Division of Oral and Maxillofacial Surgery, Matsue City Hospital