1. Department of Cardiovascular Surgery, The Second Xiangya Hospital of Central South University, Central South University , Changsha, Hunan 410011, P. R. China
2. Department of Cardiovascular Surgery, The Clinical Center for Gene Diagnosis and Therapy of The State Key Laboratory of Medical Genetics, The Second Xiangya Hospital of Central South University, Central South University , Changsha, Hunan 410011, P. R. China
3. Department of Blood Transfusion, The Second Xiangya Hospital of Central South University, Central South University , Changsha, Hunan 410011, P. R. China