1. College of Veterinary Medicine, Kangwon National University, Chuncheon 24341, Korea.
2. Laboratory of Veterinary Embryology and Biotechnology (VETEMBIO), College of Veterinary Medicine, Chungbuk National University and Institute of Stem Cell & Regenerative Medicine, Chungbuk National University, Cheongju 28644, Korea.
3. Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Korea.