1. Central Laboratory, Logistics University of Chinese People's Armed Police Force, Tianjin 300309, P.R. China
2. Department of Gastroenterology, Tianjin Fourth Central Hospital, Tianjin 300140, P.R. China
3. Department of Gastroenterology and Hepatology, The Third Central Hospital of Tianjin, Tianjin 300170, P.R. China
4. Hepatology Department of Pingjin Hospital, Logistics University of Chinese People's Armed Police Forces, Tianjin 300162, P.R. China