1. Laboratory of Theriogenology, College of Veterinary Medicine, Kangwon National University, Chuncheon 200-701, Republic of Korea
2. Division of Applied Animal Science, College of Animal Life Science, Kangwon National University, Chuncheon 200-701, Republic of Korea
3. Laboratory of Veterinary Embryology and Biotechnology, College of Veterinary Medicine, Chungbuk National University, Cheongju 361-763, Republic of Korea
4. Institute of Veterinary Science, Kangwon National University, Chuncheon 200-701, Republic of Korea