1. Cell Transplantation and Gene Therapy Institute, The Third Xiangya Hospital, Central South University, Changsha, Hunan 410000, China
2. Department of Radiology, The Third Xiangya Hospital of Central South University, Changsha, Hunan 410013, China
3. Engineering and Technology Research Center for Xenotransplantation of Hunan Province, Changsha 410000, China