1. Department of Immunology, National Institute of Infectious Diseases, Tokyo 162-8640, Japan
2. Department of Biophysics and Biochemistry, Graduate School of Science, University of Tokyo, Tokyo 113-0033, Japan
3. Laboratory of Biomedical Chemistry, Department of Applied Chemistry, Tokai University, Kanagawa 259-1292, Japan
4. Department of Veterinary Science, National Institute of Infectious Diseases, Tokyo 162-8640, Japan
5. Department of Gene Research, The Cancer Institute, Japanese Foundation for Cancer Research, Tokyo 170-8455, Japan
6. Department of Immunology, The Tokyo Metropolitan Institute of Medical Science, Tokyo 113-8613, Japan
7. Toray Basic Research Laboratories, Kanagawa-ken 259-1192, Japan
8. Department of Molecular Genetics, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
9. Department of Immunology, Medical Research Institute, Tokyo Medical and Dental University, Tokyo 113-8510, Japan
10. Division of Experimental Animal Research, National Institute of Infectious Diseases, Tokyo 162-8640, Japan