1. Division of Oral Bioengineering, Institute of Medicine and Dentistry, Niigata University, Niigata, Japan.
2. Advanced Research Center, The Nippon Dental University School of Life Dentistry at Niigata, Niigata, Japan.
3. Department of Oral and Maxillofacial Radiology, The Nippon Dental University School of Life Dentistry at Niigata, Niigata, Japan.
4. Division of Oral and Maxillofacial Surgery, Institute of Medicine and Dentistry, Niigata University, Niigata, Japan.
5. Division of Periodontology, Institute of Medicine and Dentistry, Niigata University, Niigata, Japan.
6. Midwest Biomedical Research Foundation, Research Service, Department of Veterans Affairs Medical Center, Kansas City, Missouri.
7. Bioscience Medical Research Center, Niigata University Medical and Dental Hospital, Niigata, Japan.