Two-step ESD: an option for en-bloc resection of extensive colorectal laterally spreading tumors - Kawaguti, Fabio Shiguehissa; Okazaki, Ossamu; Miyajima, Nelson Tomio; Segateli, Vanderlei; Marques, Carlos Frederico Sparapan; Nahas, Caio Sérgio Rizkallah; Martins, Bruno C; Nahas, Sergio C; Ribeiro Júnior, Ulysses; Maluf Filho, Fauze (Endoscopy international open, 2019)