1. Department of Veterinary Population Medicine, College of Veterinary Medicine, University of Minnesota, Saint Paul, MN, USA
2. Department of Veterinary Pathology, College of Veterinary Science and Animal Husbandry, Pandit Deen Dayal Upadhyaya Veterinary Science University and Cattle Research Institute, Mathura, India
3. Department of Veterinary and Biomedical Sciences, Animal Disease Research and Diagnostic Laboratory, South Dakota State University, Brookings, SD, USA
4. Department of Pathology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
5. Department of Animal Medicine, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt