1. Campus Veterinary Services; School of Veterinary Medicine; University of California; Davis CA USA
2. Department of Pharmaceutical Sciences; School of Pharmacy and Pharmaceutical Sciences; State University of New York; Buffalo NY USA
3. Department of Public Health Sciences; School of Medicine; University of California Davis; Sacramento CA USA
4. Department of Clinical Sciences; College of Veterinary Medicine and Biomedical Sciences; Colorado State University; Fort Collins CO USA
5. K.L. Maddy Equine Analytical Chemistry Laboratory; California Animal Health and Food Safety Laboratory; School of Veterinary Medicine; University of California; Davis CA USA