1. Department of Orthopaedic Surgery, School of Medicine, Keio University, Tokyo, Japan
2. Department of Physiology, School of Medicine, Keio University, Tokyo, Japan
3. Department of Orthopaedic Surgery, School of Medicine, Hirosaki University, Aomori, Japan
4. Laboratory for Cell Function and Dynamics, Advanced Technology Development Group, Brain Science Institute, RIKEN, Saitama, Japan
5. Life Function and Dynamics, ERATO, JST, Saitama, Japan