1. Department of Orthopedic Surgery, Kumamoto University School of Medicine, Kumamoto, Japan
2. Laboratory Medicine, Kumamoto University School of Medicine, Kumamoto, Japan
3. Laboratory Medicine, Kumamoto University School of Medicine, Kumamoto, Japan and Department of Orthopedic Surgery, Tokushima University School of Medicine, Tokushima, Japan
4. Department of Orthopedic Surgery, Tokushima University School of Medicine, Tokushima, Japan