1Department of Molecular Pathology, Ehime University Graduate School of Medicine, Shitsukawa, Toon City, Ehime, 791-0295, Japan
2Laboratory of Veterinary Anatomy, Nippon Veterinary and Life Science University, 1-7-1 Kyonan-cho, Musashino City, Tokyo, 180-8602, Japan
3Division of Diagnostic Pathology, Ehime University Hospital, Shitsukawa, Toon City, Ehime, 791-0295, Japan
4Department of Veterinary Surgery, Okayama University of Science, 1-3 Ikoinooka, Imabari City, Ehime, 794-8555, Japan