1. Institute of Industrial Science; The University of Tokyo; 4-6-1 Komaba Meguro-ku Tokyo 153-8505 Japan
2. Department of Tropical Medicine; The Jikei University School of Medicine; 3-25-8 Nishi-Shinbashi Minato-ku Tokyo 105-8461 Japan
3. Kanagawa Academy of Science and Technology; 3-2-1 Sakado Takatsu-ku, Kawasaki Kanagawa 213-0012 Japan