Affiliation: | 1. Department of Microbiology, Dokkyo Medical University School of Medicine, Mibu, Tochigi, Japan;2. Laboratory of Molecular and Cellular Biology, Equine Research Institute, Japan Racing Association, Utsunomiya, Tochigi;3. Division of Microbiology, Department of Pathology and Microbiology, Nihon University School of Medicine, Tokyo, Japan;4. Virus Research Center, Clinical Research Division, Sendai Medical Center, Sendai, Japan |