Rationale, new anus positioning methods, and updated protocols: Expert recommendations on cap-assisted endoscopic sclerotherapy for hemorrhoids from China Gut Conference oleh Fa-Ming Zhang, Kai-Chun Wu, Jing-Nan Li, Xin Wang, Xing-Xiang He, Rong Wan, Shi-Yao Chen, Yuan-Yuan Ji, CAES-LPRA Study Group