1. Clinical Veterinary Medicine Division, Equine Research Institute, Japan Racing Association, Tochigi, Japan
2. Drug Analysis Department, Laboratory of Racing Chemistry, Tochigi, Japan
3. Microbiology Division, Equine Research Institute, Japan Racing Association, Tochigi, Japan
4. Comparative Biomedical Sciences, The Royal Veterinary College, London, United Kingdom
5. Intheres, Ecole Nationale Vétérinaire de Toulouse, France