1. K.L. Maddy 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. School of Veterinary Medicine; University of California, Davis, 1 Garrod Drive; Davis CA USA
4. Department of Population Health and Reproduction, School of Veterinary Medicine; University of California; Davis USA