1. Laboratory of Veterinary Pharmacology, Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan
2. Clinical Pathology Department, Faculty of Veterinary Medicine, Suez Canal University, Ismailia 41522, Egypt
3. Pathology Department, Faculty of Veterinary Medicine, Suez Canal University, Ismailia 41522, Egypt