1. Department of Biochemistry Faculty of Veterinary Medicine Damanhour University Damanhour Egypt
2. Department of Community Health Sciences College of Applied Medical Sciences King Saud University Riyadh Saudi Arabia
3. Department of Nutrition and Food Science Faculty of Home Economics Helwan University Helwan Egypt
4. Department of Histology Faculty of Veterinary Medicine Damanhour University Damanhour Egypt
5. Department of Pathology Faculty of Veterinary Medicine Alexandria University Edfina Egypt