1. Department of Materials Processing,
Graduate School of Engineering, Tohoku University, 6-6-02 Aramaki-aza Aoba, Aoba-ku, Sendai 980-8579, Japan
2. Institute of Biomaterials and
Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
3. Department of Polymer Chemistry,
Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
4. ERATO Bio-nanotransporter Project, Japan Science and Technology Agency (JST), North Building,
Kyodai Katsura Venture Plaza, 1-36, Goryo-Ohara, Nishikyo-ku, Kyoto
615-8245, Japan