1 Department of Infectious Diseases, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China.
2 Department of Hepatology, The Fifth People's Hospital of Suzhou, Suzhou, Jiangsu, China.
3 Department of Infectious Diseases, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China. Electronic address: dr.wu@nju.edu.cn.