1 Large Animal Clinical Sciences, College of Veterinary Medicine, University of Tennessee, 2407 River Drive, Knoxville, TN 37996-4545, USA. Electronic address: dander48@utk.edu.
2 Department of Clinical Sciences, Faculty of Veterinary Medicine, Université de Montréal, 3200 Sicotte, St-Hyacinthe, Quebec, Canada, J2S 7C6. Electronic address: andre.desrochers@umontreal.ca.