1. Department of Hard Tissue Research, Graduate School of Oral Medicine, Matsumoto Dental University, Shiojiri, Japan.
2. Department of Oral and Maxillofacial Surgery, School of Dentistry, Matsumoto Dental University, Shiojiri, Japan.
3. Institute for Oral Science, Matsumoto Dental University, Shiojiri, Japan.
4. Department of Stomatology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China.
5. Department of General Medicine, IMSUT Hospital, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan.