1. Department of Gastroenterology, Tianjin Medical University General Hospital, Tianjin, China
2. Department of Gastroenterology, The Third Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
3. Geriatric Department, Aerospace Central Hospital, Beijing, China
4. Department of Liver Transplantation, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
5. Department of Ultrasonography, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, China