1. Research Center for Drug and Vaccine Development, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan
2. Department of Virology II, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan
3. Choju Medical Institute, Fukushimura Hospital, 19-14 Yamanaka, Noyoricho, Toyohashi-shi 441-8124, Japan
4. Laboratory of Virus Control, Research Institute for Microbial Diseases, Osaka University, Suita 565-0871, Japan
5. Insect-Virus Interactions Unit, Department of Virology, Institut Pasteur, 75015 Paris, France
6. Department of Microbiology and Immunology, Faculty of Medicine, Hokkaido University, N-15, W-7, Kita-ku, Sapporo 060-8638, Japan
7. Department of Applied Biological Sciences, Tokyo University of Science, 2641 Yamazaki, Noda 278-8510, Japan