1. Division of Biomedical Engineering, Graduate School of Medicine, Kyushu University, Fukuoka, Japan.
2. Department of Clinical Pharmacology, Graduate School of Medicine, Kyushu University, Fukuoka, Japan.
3. Biomaterials Research Center, Korea Institute of Science and Technology, Seoul, Korea.
4. Department of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Korea.