1. School of Medicine, Northwest University, Xi'an, Shaanxi 710069, P.R. China
2. Core Laboratory, Xi'an Area Medical Laboratory Center, Xi'an, Shaanxi 712000, P.R. China
3. Department of Transfusion Medicine, Xijing Hospital, Xi'an, Shaanxi 710032, P.R. China
4. Institute of Clinical Blood Transfusion, Guangzhou Blood Center, Guangzhou, Guangdong 510095, P.R. China
5. Institute of Clinical Blood Transfusion, Guangzhou Blood Center, Guangzhou, Guangdong 510095, P.R. China