1 Department of Gastroenterology and Hepatology, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, 361003, China.
2 Department of Gastroenterology and Hepatology, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, 361003, China. Electronic address: xuzhong@stu.xmu.edu.cn.
3 Department of Gastroenterology and Hepatology, The First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, 361003, China; The School of Clinical Medicine, Fujian Medical University, Fuzhou, 350004, China. Electronic address: hwf0625@xmu.edu.cn.