1. Department of Clinical Sciences, College of Veterinary Medicine, Auburn University, Auburn, AL 36849 USA.
2. Food Animal Medicine and Surgery, Texas Tech University School of Veterinary Medicine, 7671 Evans Dr., Amarillo, TX 79106 USA.
3. Center for Innovation in Veterinary Education and Technology (CIVET), and Associate Professor of Veterinary Medicine, Lincoln Memorial University College of Veterinary Medicine, 6965 Cumberland Gap Parkway, Harrogate, TN 37752 USA.
4. Emergency and Critical Care, Small Animal Clinical Sciences, Virginia-Maryland College of Veterinary Medicine, 205 Duck Pond Dr., Blacksburg, VA 24061 USA.