1. Department of Rehabilitation Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan;
2. Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan;
3. Department of Orthopaedic Surgery, Kyushu University, Fukuoka, Japan;
4. Department of Cell Growth and Differentiation, Center for iPS Cell Research and Application, Kyoto University, Kyoto, Japan;
5. Department of Tissue Regeneration, Institute for Frontier Medical Sciences, Kyoto University, Kyoto, Japan;
6. Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan