1. Department of Animal Medicine Faculty of Veterinary Medicine Kafrelsheikh University Kafrelsheikh Egypt
2. MS Society University of Oxford London UK
3. School of Veterinary Science Massey University Palmerston North New Zealand
4. College of Veterinary Medicine Cornell University Ithaca NY USA
5. Veterinary Epidemiology, Economics and Public Health Group Department of Pathobiology and Population Sciences The Royal Veterinary College Herts UK