1. Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
2. Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
3. Department of Nephrology, Xingguo County People's Hospital, Ganzhou, Jiangxi 344000, P.R. China