Endoscopic submucosal dissection for residual rectal polyps embedded in tissue scar: a “rescue therapy” to prevent surgical intervention? - Azzolini, F.; Biolchini, F.; Sassatelli, R.; Camellini, L.; Decembrino, F.; Iori, V.; Tioli, C.; Sereni, G.; Bedogni, G. (Endoscopy, 2008)