1. Department of Oral Pathobiological Science and Surgery, Tokyo Dental College, Chiyoda, Tokyo 101 – 0061, Japan
2. Oral Health Science Center, Tokyo Dental College, Chiyoda, Tokyo 101 – 0061, Japan
3. Department of Oral and Maxillofacial Surgery, Tokyo Dental College, Chiyoda, Tokyo 101 – 0061, Japan