1. Department of Colorectal Surgery, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
2. Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China
3. Department of Pathology, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
4. Department of Gastroenterology, Sir Run Run Shaw Hospital of Zhejiang University School of Medicine, Hangzhou, China
5. Department of Gastroenterology, Jiangsu Province Hospital, Nanjing, China
6. Department of Gastroenterology, The First Affiliated Hospital of Kunming Medical University, Kunming, China
7. Department of Gastroenterology, Wuhan Union Hospital, Wuhan, China
8. Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, China
9. Medical Center for Digestive Diseases, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
10. Department of Gastroenterology, The First Affiliated Hospital of Anhui Medical University, Hefei, China
11. Department of Pathology and Laboratory Medicine, University of Florida, Gainesville, FL, USA
12. Department of Anatomic Pathology, The Cleveland Clinic Foundation, Cleveland, OH, USA
13. Department of Gastroenterology, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, China
14. Department of Gastroenterology/Hepatology, The Cleveland Clinic Foundation, Cleveland, OH, USA