1. Incheon General Animal Hospital, Incheon 22551, Korea
2. Laboratory of Veterinary Theriogenology, College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Korea
3. Department of Biomaterials Science, College of Natural Resources and Life Science/Life and Industry Convergence Research Institute, Pusan National University, Miryang 50463, Korea