1. Drug Analysis Department, Laboratory of Racing Chemistry, 1731-2 Tsuruta-machi, Utsunomiya, Tochigi, 320-0851, Japan
2. Department of Pharmaceutical Sciences, Tohoku University Hospital, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
3. Anti-Doping Section, Equine Department, Japan Racing Association, 1-1-1 Nishishimbashi, Minato-ku, Tokyo, 105-0003, Japan
4. Equine Veterinary Clinic, Horse Racing School, Japan Racing Association, 835-1 Ne Shiroi city, Chiba, Japan, 270-1431, Japan
5. Research Planning & Coordination Division, Equine Research Institute, Japan Racing Association, 1400-4 Shiba, Shimotsuke, Tochigi, 329-0412, Japan