Affiliation: | 1)Laboratory of Veterinary Virology, Department of Pathobiology, School of Veterinary Medicine, Rakuno Gakuen University, 582 Bunkyoudai Midori-machi, Ebetsu, Hokkaido 069–8501, Japan;2)Zoetis Japan Co., Ltd., 3–22–7 Yoyogi, Shibuya-ku, Tokyo 151–0053, Japan |