1. Division of Pathology, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-9501, Japan
2. Japan SLC, Inc., 3-5-1 Aoihigashi, Naka-ku, Hamamatsu, Shizuoka 433-8114, Japan
3. Faculty of Animal Health Technology, Yamazaki University of Animal Health Technology, 4-7-2 Minami-Osawa, Hachioji, Tokyo 192-0364, Japan