1. 1Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Japan
2. 2Department of Biomedical Sciences, Cornell University, Ithaca, New York, USA
3. 3Department of Clinical Sciences, College of Veterinary Medicine, Nueva Vizcaya State University, Nueva Vizcaya, Philippines
4. 4Department of Theriogenology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
5. 5Genetics Hokkaido Association, Shimizu-Cho, Japan
6. 6Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima, Japan
7. 7Department of Theriogenology, Faculty of Veterinary Medicine, Damanhur University, Behera, Egypt