1. Department of Abdominal Oncology, The Cancer Center of The Fifth Affiliated Hospital of Sun Yat-Sen University, Zhuhai, Guangdong 519000, P.R. China
2. Department of General Surgery, The Fifth Affiliated Hospital of Sun Yat-Sen University, Zhuhai, Guangdong 519000, P.R. China
3. Department of Pathology, The Fifth Affiliated Hospital of Sun Yat-Sen University, Zhuhai, Guangdong 519000, P.R. China
4. Department of Gastroenterology, The Seventh Affiliated Hospital of Sun Yat-Sen University, Shenzhen, Guangdong 518107, P.R. China
5. Department of Gastroenterology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong 510120, P.R. China
6. Center for Interventional Medicine, The Fifth Affiliated Hospital, Sun Yat-Sen University, Zhuhai, Guangdong 519000, P.R. China