1 The First College of Clinical Medical Science, China Three Gorges University, Yichang, China; Institute of Digestive Disease, China Three Gorges University, Yichang, China; Department of Gastroenterology, Yichang Central People's Hospital, Yichang, China.
2 Wuhan Emergency Medical Services, Wuhan, China. Electronic address: 499404814@qq.com.
3 The First College of Clinical Medical Science, China Three Gorges University, Yichang, China; Institute of Digestive Disease, China Three Gorges University, Yichang, China; Department of Gastroenterology, Yichang Central People's Hospital, Yichang, China. Electronic address: liuwei@ctgu.edu.cn.