1. Laboratory of Clinical Veterinary Medicine for Large Animal, Division of Veterinary Medicine, School of Veterinary Medicine Kitasato University Towada Japan
2. Hanwoo Research Institute National Institute of Animal Science of Korea Pyeongchang Korea
3. Department of Marine Bioscience, Atmosphere and Ocean Research Institute The University of Tokyo Kashiwa Japan
4. Laboratory of Theriogenology, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine Hokkaido University Sapporo Japan
5. Laboratory of Animal Reproduction, Department of Animal Science, School of Veterinary Medicine Kitasato University Towada Japan