1. Department of Gastroenterology, The First Affiliated Hospital of Guangxi Medical University, Nanning 530021, Guangxi Zhuang Autonomous Region, China.
2. Department of Gastroenterology, The Second Affiliated Hospital of Guangxi Medical University, Nanning 530007, Guangxi Zhuang Autonomous Region, China.
3. Department of Clinical Laboratory, The First People’s Hospital of Jingzhou City, Jingzhou, Jingzhou 434000, Hubei, China.