1. West China Hospital, Sichuan University; Department of Bile Duct Surgery; No. 37, Guo Xue Xiang Chengdu Sichuan China 610041
2. West China School of Pharmacy, Sichuan University; Department of Chemistry of Medicinal Natural Products; Chengdu Sichuan China 610041
3. West China Hospital, Sichuan University; Chinese Clinical Trial Registry, Chinese Ethics Committee of Registering Clinical Trials; No. 37, Guo Xue Xiang Chengdu Sichuan China 610041