1. Department of Critical Liver Diseases, Liver Research Center, Beijing Friendship Hospital, Capital Medical University , Beijing, P. R. China
2. Department of Gastroenterology, Affiliated Hospital of Jining Medical University, Jining Medical University , Jining, Shandong, P. R. China
3. Clinical Medical College of Jining Medical University, Department of Clinical Medicine, Jining Medical University , Jining, Shandong, P. R. China
4. Department of Cardiology, Beijing Friendship Hospital, Capital Medical University , Beijing, P. R. China