1. Center for Preventive Doping Research - Institute of Biochemistry; German Sport University Cologne; Cologne Germany
2. Department of Pharmacology, Toxicology and Pharmacy; University of Veterinary Medicine Hannover; Hannover Germany
3. German Equestrian Federation; Warendorf Germany
4. Department of Experimental Physiopathology and Toxicology; National Veterinary School of Toulouse; Toulouse France