1. Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Zagazig University, 44159 Zagazig, El-Sharkia, Egypt.
2. Department of Surgery, Radiology and Anaesthesiology, Faculty of Veterinary Medicine, Zagazig University, 44159 Zagazig, El-Sharkia, Egypt.
3. Department of Animal Medicine, Faculty of Veterinary Medicine, Zagazig University, 44159 Zagazig, El-Sharkia, Egypt.