1. K.L. Maddy Equine Analytical Chemistry Laboratory; School of Veterinary Medicine, University of California; Davis California USA
2. Department of Veterinary Molecular Biosciences; School of Veterinary Medicine, University of California; Davis California USA
3. Willow Oak Equine; Woodland California USA
4. Department of Health and Reproduction; School of Veterinary Medicine, University of California; Davis California USA