1. Liver Cirrhosis Study Group, Department of Gastroenterology, General Hospital of Northern Theater Command (formerly called General Hospital of Shenyang Military Area), Shenyang, China
2. China Medical University, Shenyang, China
3. Division of Digestive Diseases, Department of Internal Medicine, School of Medicine, Emory University, Atlanta, GA, USA
4. Division of Gastroenterology, Department of Internal Medicine, Medical School, Bezmialem Vakif University, Istanbul, Turkey
5. Liver Cirrhosis Study Group, Department of Gastroenterology, General Hospital of Northern Theater Command (formerly called General Hospital of Shenyang Military Area), No. 83 Wenhua Road, Shenyang 110840, Liaoning Province, China