1. E El-Shafaey:
Department of Surgery, Anaesthesiology and Radiology, Faculty of Veterinary Medicine, Mansoura University, Mansoura-city, Dakahlia, Egypt
2. T Aoki:
Department of Clinical Veterinary Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro-city, Hokkaido, Japan
3. M Ishii:
Department of Clinical Veterinary Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro-city, Hokkaido, Japan
4. M Sasaki:
Department of Basic Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro-city, Hokkaido, Japan
5. K Yamada:
Department of Clinical Veterinary Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro-city, Hokkaido, Japan