1. Department of Animal Science, University of Nebraska-Lincoln, Lincoln, NE 68503, USA
2. Department of Large Animal Clinical Sciences, Virginia Tech, Blacksburg, VA 24061, USA
3. College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523, USA
4. Department of Large Animal Clinical Sciences, University of Tennessee, Knoxville, TN 37996, USA
5. School of Veterinary Medicine and Biomedical Science, University of Nebraska – Lincoln, Lincoln, NE 68503, USA