1. K.L. Maddy Equine Analytical Chemistry Laboratory; School of Veterinary Medicine; University of California; Davis CA USA
2. Department of Veterinary Molecular Biosciences; School of Veterinary Medicine; University of California; Davis CA USA
3. Private Practitioner; San Diego CA USA
4. Department of Medicine and Epidemiology; School of Veterinary Medicine; University of California; Davis CA USA
5. Department of Population Health and Reproduction; School of Veterinary Medicine; University of California; Davis CA USA
6. School of Veterinary Medicine; University of California; Davis CA USA
7. Department of Surgical & Radiological Sciences; School of Veterinary Medicine; Davis CA USA