1. Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Dentistry and Pharmaceutical Sciences Okayama University Okayama Japan
2. Department of Oral Pathology and Medicine, Faculty of Medicine, Dentistry and Pharmaceutical Sciences Okayama University Okayama Japan
3. Department of Dental Pharmacology, Faculty of Medicine, Dentistry and Pharmaceutical Sciences Okayama University Okayama Japan
4. Department of Oral and Maxillofacial Surgery Shimane University Faculty of Medicine Izumo Shimane Japan