1. Tissue Engineering Research Center, National Institute of Advanced Industrial Science and Technology, Amagasaki, Japan
2. Biomaterials Center, National Institute for Materials Science, Tsukuba, Japan
3. Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
4. Department of Orthopedics, Institute of Clinical Medicine, University of Tsukuba, Tsukuba, Japan