1. Department of Materials Engineering, School of Engineering; The University of Tokyo; 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan
2. Department of Bioengineering, School of Engineering; The University of Tokyo; 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan
3. Division of Science for Joint Reconstruction, Graduate School of Medicine; The University of Tokyo; 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan
4. Research Department; KYOCERA Medical Corporation; 3-3-31 Miyahara Yodogawa-ku Osaka 532-0003 Japan