1. Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan,
2. Department of the Control for Rheumatic Diseases, Graduate School of Medicine, Kyoto University, Kyoto, Japan,
3. Department of Tissue Regeneration, The Institute for Frontier Medical Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan, and
4. Department of Orthopaedic Surgery, Graduate School of Medicine, Gifu University, Gifu, Japan