1. Department of Oral and Maxillofacial Surgery and Stomatology, Okazaki City Hospital, Okazaki, Japan
2. Department of Oral Medicine and Pathology, WHO Collaborating Centre for Oral Cancer and Precancer, King’s College London Dental Institute, London, UK
3. Department of Maxillofacial Surgery, Aichi-Gakuin Dental Hospital, Nagoya, Japan
4. Department of Hygiene, Fujita Health University School of Medicine, Tokyo, Japan
5. Department of Oral and Maxillofacial Surgery, University of Tsukuba Hospital, Tsukuba, Japan
6. Department of Oral and Maxillofacial Surgery, Yokkaichi Municipal Hospital, Yokkaichi, Japan
7. Department of Oral and Maxillofacial Surgery, Toyota Memorial Hospital, Toyota, Japan
8. Department of Oral and Maxillofacial Surgery, Hekinan City Hospital, Hekinan, Japan