LUMEN-APPOSING METAL STENTS VERSUS DOUBLE PIGTAIL PLASTIC STENTS FOR ENDOSCOPIC DRAINAGE OF PERIPANCREATIC FLUID COLLECTIONS: RESULTS FROM A MULTICENTER EUROPEAN STUDY - Sioulas, AD; Petrone, MC; Tadic, M; Karoumpalis, I; Hritz, I; Kypraios, D; Scotiniotis, I; Vezakis, A; Kanavidis, P; Keczer, B; Tziatzios, G; Gkolfakis, P; Triantafyllou, K; Polydorou, A; Grgurevic, I; Arcidiacono, PG; Papanikolaou, IS (Endoscopy, 2019)