1. Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Japan
2. Department of Theriogenology, Faculty of Veterinary Medicine, Damanhour University, Behera, Egypt
3. Department of Theriogenology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt
4. Department of Basic Veterinary Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Japan
5. Genetics Hokkaido Association, Shimizu-cho 089-0103, Japan
6. Department of Animal Medicine, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt