1. Institute
for Biomedical Sciences, Shinshu University, Asahi 3-1-1, Matsumoto 390-8621, Japan
2. Department
of Orthopaedic Surgery, Shinshu University School of Medicine, Asahi
3-1-1, Matsumoto 390-8621, Japan
3. R&D Center, Nakashima Medical Co. Ltd., Haga 5322, Kita-ku, Okayama 701-1221, Japan