Extralevator Abdominal Perineal Excision Versus Standard Abdominal Perineal Excision: Impact on Quality of the Resected Specimen and Postoperative Morbidity - Habr-Gama, Angelita; São Julião, Guilherme P.; Mattacheo, Adrian; Campos-Lobato, Luiz Felipe de; Aleman, Edgar; Vailati, Bruna B.; Gama-Rodrigues, Joaquim; Perez, Rodrigo Oliva (World Journal of Surgery, 2017)