1. Liver Cirrhosis Study Group, Department of Gastroenterology, General Hospital of Northern Theater Command (formerly General Hospital of Shenyang Military Area), Shenyang, China
2. Postgraduate College, Liaoning University of Traditional Chinese Medicine, Shenyang, China
3. Department of Life Sciences and Biopharmaceutis, Shenyang Pharmaceutical University, Shenyang, China
4. Section of Medical Service, General Hospital of Northern Theater Command (formerly General Hospital of Shenyang Military Area), Shenyang, China
5. Department of Internal Medicine II, Division of Gastroenterology and Hepatology, Klinikum Hanau, Academic Teaching Hospital of the Medical Faculty, Goethe University Frankfurt/Main, Frankfurt am Main, D-63450 Hanau, Germany