1. Department of Bioengineering, Graduate School of Engineering, The University of Tokyo, Tokyo, Japan
2. Department of Radiology, Center for Medical Imaging, and State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, China
3. Kanagawa Institute of Industrial Science and Technology, Ebina, Japan
4. Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Tokyo, Japan
5. Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo, Japan
6. Graduate School of Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan