1. Division I of In Vitro Diagnostics for Infectious Diseases, Institute for In Vitro Diagnostics Control, National Institutes for Food and Drug Control, 2 Tiantanxili Rd, Dongcheng District, Beijing 100050, China
2. Department of Hepatobiliary and Pancreatic Surgery, First Hospital/First Clinical College of Shanxi Medical University, Taiyuan 030000, China