1. Department of Medicine, Guangxi University of Science and Technology, Liuzhou, Guangxi Zhuang Autonomous Region 545005, P.R. China
2. Department of Gastroenterology, The First Affiliated Hospital of Guangxi University of Science and Technology, Liuzhou, Guangxi Zhuang Autonomous Region 545001, P.R. China
3. Department of Clinical Laboratory, The Second Clinical Medical College of Guangxi University of Science and Technology, Liuzhou, Guangxi Zhuang Autonomous Region 545006, P.R. China
4. Department of Clinical Laboratory, The First Affiliated Hospital of Guangxi University of Science and Technology, Liuzhou, Guangxi Zhuang Autonomous Region 545001, P.R. China