1. Department of Animal Sciences, Center for the Animal Bioreactor and Xenotransplantation, Chungbuk National University, Cheongju, South Korea.
2. Lab of Stem Cells and Cell Reprogramming, Department of Biomedical Engineering, Dongguk University, Seoul, South Korea.
3. Department of Veterinary Medicine College of Agriculture, Yanbian University, Yanji, Jilin Province, China.