1. Department of Laboratory Medicine, The Third Xiangya Hospital, Central South University, Changsha 410013, Hunan, P. R. China
2. Department of Blood Transfusion, The Third Xiangya Hospital, Central South University, Changsha 410013, Hunan, P. R. China
3. Department of Laboratory Medicine, The Second Xiangya Hospital, Central South University, Changsha 410011, Hunan, P. R. China