1. Institute for Human Science and Biomedical Engineering, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan
2. Department of Radiological Science, Graduate School of Human Health Science, Tokyo Metropolitan University, Arakawa-ku, Tokyo, Japan
3. Department of Cartilage and Bone Regeneration, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan