1. Department of Cytology and Histology, Faculty of Veterinary Medicine Suez Canal University Ismailia Egypt
2. Department of Biotechnology College of Science, Taif University Taif Saudi Arabia
3. Department of Anatomy and Embryology, Faculty of Veterinary Medicine Mansoura University Mansoura Egypt
4. Department of Anatomy and Embryology, Faculty of Veterinary Medicine University of Sadat City Sadat City Egypt
5. Department of Cytology and Histology, Faculty of Veterinary Medicine University of Sadat City Sadat City Egypt
6. Department of Animal Histology and Anatomy, School of Veterinary Medicine Badr University in Cairo (BUC) Cairo Egypt