1. Department of Oral Surgery, Kamagaya General Hospital, Chiba, Japan
2. Department of Regenerative Oral Surgery, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
3. Oral and Maxillofacial Surgery, Department of Oral Restitution, Division of Oral Health Sciences, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
4. Harashima Dental Clinic, Tokyo, Japan