1. Department of Gastroenterology, The Fifth Affiliated Hospital of Kunming Medical University, Gejiu Peoples Hospital, Gejiu, Yunnan Province, P.R. China
2. Department of Pharmacy, Suining Branch of the Hospital Affiliated to Xuzhou Medical University, Suining, P.R. China
3. Department of Colorectal Surgery, The Second Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang Province, P.R. China
4. Department of Surgery, The Second Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang Province, P.R. China