1. Division of Cytokine Signaling, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.
2. Department of AIDS Research, Institute of Tropical Medicine, G-COE, Nagasaki University, Nagasaki, Japan.
3. Department of Molecular and Cellular Biology, Graduate School of Human Health Sciences, University of Nagasaki, Nagasaki, Japan.
4. Department of Immunology, Graduate School and Faculty of Medicine, University of the Ryukyu, Okinawa, Japan.
5. Laboratory of Viral Genomics, Pathogen Genomics Center, National Institute of Infectious Diseases, Tokyo, Japan.
6. Department of Microbiology, National University of Singapore, Singapore, Singapore.
7. Kowa Company, Ltd., Tokyo, Japan.