1. Department of Oral and Maxillofacial Surgery, School of Dentistry, Matsumoto Dental University, Shiojiri, Japan.
2. Institute of Oral Science, Matsumoto Dental University, Shiojiri, Japan.
3. Department of Hard Tissue Research, Graduate School of Oral Medicine, Matsumoto Dental University, Shiojiri, Japan.
4. Department of Dental Material Science, School of Dentistry, Matsumoto Dental University, Shiojiri, Japan.
5. Department of General Medicine, IMSUT Hospital, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan.