1. College of Veterinary Medicine, Chungbuk National University, Cheongju 28644, Republic of Korea
2. Central Research Institute, Designed Cells Co., Ltd., Cheongju 28576, Republic of Korea
3. Department of Biomedical Science, Korea University College of Medicine, Seoul 02841, Republic of Korea
4. Department of Obstetrics and Gynecology, Korea University College of Medicine, Seoul 02841, Republic of Korea