1. Institute of hematology, Blood Center of Shandong Province, Jinan, Shandong Province, P. R. China
2. Department of Blood Transfusion, Taian City Central Hospital, Taian, Shandong Province, P. R. China
3. Department of Blood Component Preparations, Yantai Blood Bank, Yantai, Shandong Province, P. R. China
4. Department of Liver Disease, Yantai Infectious Disease Hospital, Yantai, Shandong Province, P. R. China
5. Department of Biochemistry and Molecular Biology, Medical college of Shandong University, Jinan, Shandong Province, P. R. China