OC.15.5 COST-EFFECTIVENESS INTERIM ANALYSIS OF A RANDOMIZED CONTROLLED TRIAL COMPARING FULLY COVERED SELF EXPANDABLE METAL STENTING AND PLASTIC MULTISTENTING FOR BILIARY ANASTOMOTIC STRICTURE AFTER LIVER TRANSPLANTATION. Issue 2 (15th March 2018) - Santi, G.; Rosa, R.; Parzanese, I.; Macchini, F.; Tenca, A.; Conte, D.; Penagini, R.; Cantù, P.