1. Department of Gastrointestinal Endoscopy, The Sixth Affiliated Hospital, Sun Yat-Sen University, Guangzhou, People’s Republic of China
2. Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, The Sixth Affiliated Hospital, Sun Yat-Sen University, Guangzhou, People’s Republic of China
3. Department of Pathology, The Sixth Affiliated Hospital, Sun Yat-Sen University, Guangzhou, People’s Republic of China
4. Department of Otolaryngology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, People’s Republic of China
5. Department of Medical Hematology, The Sixth Affiliated Hospital, Sun Yat-Sen University, Guangzhou, People’s Republic of China
6. Department of Gastroenterology, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, People’s Republic of China