1. Department of Gastroenterology of Southwest Hospital Army Medical University, Third Military Medical University, Chongqing 400038, P. R. China
2. TCM Regulating Metabolic Diseases Key Laboratory of Sichuan Province, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610075, P. R. China
3. College of Chemistry and Chemical Engineering, Linyi University, Linyi 276012, Shandong, P. R. China