1. Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
2. Hubei Clinical Center & Key Laboratory of Intestinal & Colorectal Diseases, Wuhan 430071, China
3. Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan 430060, China
4. Department of Gastroenterology, The Central Hospital of Enshi Autonomous Prefecture, Enshi 445000 China
5. Department of Critical Care Medicine, The People's Hospital of Huangshan, Huangshan 245000 China