1. Department of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodai, Nada-ku, Kobe 657-8501, Japan
2. Research Center for Membrane and Film Technology, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan
3. Graduate School of Medicine, Kobe University, 7-5-2 Kusunoki-cho, Chuou-ku, Kobe 650-0017, Japan
4. Medical Materials Development, New Business Development Department, Corporate R&D Division, NOF Corporation, 3-25-14 Tonomachi, Kawasaki-ku, Kawasaki 210-0821, Japan