1. Department of Clinical Chemistry and Immunology , Shanghai Center for Clinical Laboratory , Shanghai , P.R. China
2. Department of Clinical Laboratory , Peking University Shougang Hospital , Beijing , P.R. China
3. Peking University Hepatology Institute , Peking University People’s Hospital , Beijing , P.R. China
4. Standardization & Performance Evaluation Laboratory, Chemclin Diagnostics Co., LTD, Beijing , P.R. China