Endoscopic submucosal dissection for proximal colonic lesions: An effective therapeutic option - Ludovico Alfarone; Roberta Maselli; Cesare Hassan; Paola Spaggiari; Marco Spadaccini; Antonio Capogreco; Davide Massimi; Roberto De Sire; Elisabetta Mastrorocco; Alessandro Repici (Endoscopy International Open)