Underwater versus conventional EMR for nonpedunculated colorectal lesions: a randomized clinical trial - Lenz, Luciano; Martins, Bruno; Paulo, Gustavo Andrade de; Kawaguti, Fabio Shiguehissa; Baba, Elisa Ryoka; Uemura, Ricardo Sato; Gusmon, Carla Cristina; Geiger, Sebastian Naschold; Moura, Renata Nobre; Ribeiro Junior, Ulysses (Gastrointestinal endoscopy, 2023)