1. Experimental Research Center for Infectious Diseases, Institute for Virus Research, Kyoto University, 53 Shogoin, Kawara-cho, Sakyo-ku, Kyoto, Japan.
2. Bioresource Center, RIKEN Tsukuba Institute, 3-1-1 Koyadai, Tsukuba, Japan.
3. Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland 4072, Australia.
4. Research Institute for Microbial Diseases, Osaka University, Suita, Osaka 565-0871, Japan.
5. Department of Veterinary Anatomy, The University of Tokyo, Yayoi 1-1-1, Bunkyoku, Tokyo 113-8657, Japan.
6. Cellular Memory Laboratory, RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan.
7. Graduate School of Biostudies, Kyoto University, 53 Shogoin, Kawara-cho, Sakyo-ku, Kyoto, Japan.