Affiliation: | 1. Graduate School of Agricultural Science, Tohoku University, Aoba‐ku, Sendai, Japan;2. Division of Virology, National Cancer Center Research Institute, Chuo‐ku, Tokyo, Japan;3. Faculty of Applied Life Sciences, Niigata University of Pharmacy and Applied Life Sciences, Akiha‐ku, Niigata, Japan;4. Animal Research Center, Sapporo Medical University, Chuo‐ku, Sapporo, Japan |