1. Laboratory of Veterinary Surgery Tokyo University of Agriculture and Technology Tokyo Japan
2. Department of Veterinary Surgery, Faculty of Veterinary Medicine Suez Canal University Ismailia Egypt
3. Laboratory of Veterinary Anatomy, Division of Animal Life Science Tokyo University of Agriculture and Technology Tokyo Japan
4. Department of Applied Biological Science Tokyo University of Agriculture and Technology Tokyo Japan
5. Department of Cytology and Histology, Faculty of Veterinary Medicine Suez Canal University Ismailia Egypt