Affiliation: | 1.Hidaka Training and Research Center, Japan Racing Association, Hokkaido 057-0171, Japan;2.Hidaka Horse Breeders Association, Hokkaido 056-0002, Japan;3.Epizootic Research Center, Japan Racing Association, Tochigi 329-0412, Japan;4.Department of Clinical Veterinary Science, Obihiro University of Agriculture and Veterinary Medicine, Hokkaido080-8555, Japan |