1. Department of Chronic Liver Disease, Tianjin Second People's Hospital, Tianjin Medical Institute of Hepatology, Tianjin 300192, P.R. China
2. Postgraduate School, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, P.R. China
3. Department of Clinical Laboratory, Tianjin Haihe Hospital, Tianjin 300351, P.R. China