Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, China. Hubei Clinical Center and Key Lab of Intestinal and Colorectal Diseases, Wuhan, China. Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, China. Hubei Clinical Center and Key Lab of Intestinal and Colorectal Diseases, Wuhan, China. Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, China. Hubei Clinical Center and Key Lab of Intestinal and Colorectal Diseases, Wuhan, China. Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, China. Hubei Clinical Center and Key Lab of Intestinal and Colorectal Diseases, Wuhan, China. Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, China. Hubei Clinical Center and Key Lab of Intestinal and Colorectal Diseases, Wuhan, China. Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, China. Hubei Clinical Center and Key Lab of Intestinal and Colorectal Diseases, Wuhan, China. Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, China. Hubei Clinical Center and Key Lab of Intestinal and Colorectal Diseases, Wuhan, China. Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, China. Hubei Clinical Center and Key Lab of Intestinal and Colorectal Diseases, Wuhan, China. Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, China. Hubei Clinical Center and Key Lab of Intestinal and Colorectal Diseases, Wuhan, China. Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, China. Hubei Clinical Center and Key Lab of Intestinal and Colorectal Diseases, Wuhan, China.