1. Sanritsu Zelkova Veterinary Laboratory, 2–5–8 Kuji, Takatsu-ku, Kawasaki-shi, Kanagawa 213–0032, Japan
2. Department of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1–1–1 Yayoi, Bunkyo-ku, Tokyo 113–8657, Japan
3. Japan Animal Referral Medical Center Kawasaki, 2–5–8 Kuji, Takatsu-ku, Kawasaki-shi, Kanagawa 213–0032, Japan
4. Iwane Animal Clinic, 468, Murokouji, Takizawa-shi, Iwate 020–0634, Japan