IMPLEMENTATION OF ENDOSCOPIC SUBMUCOSAL DISSECTION (ESD) IN EUROPE – SURVEY AFTER ESD EXPERT TRAINING WORKSHOPS 2009 – 2018 - Oyama, T; Yahagi, N; Berr, F; Kiesslich, T; Ponchon, T; Toyonaga, T; Uraoka, T; Ziachehabi, A; Schachinger, F; Seifert, H; Kaehler, G; Wagner, A; Messmann, H; Hochberger, J; Kantsevoy, SV; Mitrakov, A (Endoscopy, 2019)