COMBINATION OF POCKET-ESD WITH COUNTERTRACTION AND PARTIAL FULL THICKNESS EXCISION FOR AN ADVANCED COLONIC ADENOMA IN THE SETTING OF SEVERE FIBROSIS - Mavrogenis, G; Ntourakis, D; Tsevgas, I; Kaklamanis, L; Gemos, K; Chiotelis, O; Tsiakos, S; Zachariadis, D (Endoscopy, 2018)