1. Rehabilitation Research Centre, Equine Research Institute, Japan Racing Association; Uenohara 71, Joban shiratori-machi, Iwaki- shi Fukushima 972-8325 Japan
2. Clinical Science & Pathobiology Division; Equine Research Institute, Japan Racing Association; Shiba 1400-4 Shimotsuke Tochigi 329-0412 Japan
3. Race Horse Hospital, Ritto Training Center, Japan Racing Association; Misono 1028 Ritto Shiga 520-3085 Japan