1. Department of Clinical Pathology; College of Veterinary Medicine; University of Tehran; Tehran Iran
2. Department of Microbiology; College of Veterinary Medicine; University of Tehran; Tehran Iran
3. Department of Veterinary Medical Sciences; Alma Mater Studiorum University of Bologna; Bologna Italy
4. Department of Epidemiology; College of Veterinary Medicine; University of Tehran; Tehran Iran
5. School of Veterinary Sciences; University of Bristol; Bristol UK