1. Graduate School of Animal and Food Hygiene; Obihiro University of Agriculture and Veterinary Medicine; Obihiro Japan
2. Faculty of Veterinary Medicine; Department of Theriogenology; Damanhur University; Behera Egypt
3. Faculty of Veterinary Medicine; Department of Theriogenology; Assiut University; Assiut Egypt
4. Department of Basic Veterinary Science; Obihiro University of Agriculture and Veterinary Medicine; Obihiro Japan
5. Genetics Hokkaido Association; Shimizu-cho Japan