1 State Key Laboratory of Organ Failure Research, Guangdong Provincial Key Laboratory of Gastroenterology, Department of Gastroenterology, Nanfang Hospital, Southern Medical University, 1838 North Guangzhou Road, Guangzhou, Guangdong 510515, China.
2 Department of Gastroenterology, First Affiliated Hospital, Nanjing Medical University, 68 Changle Road, Nanjing 210006, China.
3 Department of Radiation Oncology and Cyberknife Center, Key Laboratory of Cancer Prevention and Therapy, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center for Cancer, Tianjin 300060, China.
4 Department of Gastroenterology, Liuzhou Worker's Hospital, Liuzhou 545005, China.