1 Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan; Laboratory of Bone and Joint Diseases, Center for Integrative Medical Sciences, RIKEN, Tokyo, Japan.
2 Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan.
3 Laboratory of Bone and Joint Diseases, Center for Integrative Medical Sciences, RIKEN, Tokyo, Japan.
4 Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan. Electronic address: watakota@gmail.com.