1. Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo, Tokyo, Japan
2. Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda, Tokyo, Japan
3. Graduate School of Engineering, The University of Tokyo, Bunyko, Tokyo, Japan
4. Department of Anatomy, School of Dentistry, Aichi Gakuin University, Nagoya, Aichi, Japan