Endoscopic full-thickness resection in the rectum closed with PolyLoop-and-clips method using single-channel endoscope - Castillo-Regalado, Edgar; Huertas, Carlos; Torrealba, Leyanira; Hombrados, Manuela; Figa, Montserrat; Busquets, David; Uchima, Hugo (Endoscopy, 2021)