GEL-ASSISTED ESD FOR REMOVAL OF A RECTAL NON GRANULAR LATERALLY SPREADING TUMOR PSEUDO-DEPRESSED TYPE WITH SUSPICION OF SUPERFICIAL SUBMUCOSAL INVASIVE CANCER - Ouazzani, S; Bucalau, AM; Gkolfakis, P; Verset, L; Van Laethem, JL; Devière, J; Lemmers, A (Endoscopy, 2020)