1. Department of Virology I, National Institute of Infectious Diseases, 1-23-1, Toyama, Shinjuku-ku, Tokyo 162-8640, Japan.
2. Faculty of Medical Sciences, University of Fukui, 23-3 Matsuoka, Eiheiji, Fukui 910-1193, Japan.
3. Research Center for the Pacific Islands, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-8580, Japan.
4. Department of Anesthesiology, Saitama Medical University, 38 Moroyama-Machi, Iruma-Gun, Saitama, 350-0495, Japan.
5. NODAI Genome Research Center, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya, Tokyo 156-8502, Japan.
6. Institute of Agrobiological Sciences, National Agriculture and Food Research Organization, 1-2, Owashi, Tsukuba, Ibaraki 305-0851, Japan.