OC.01.4 THREE YEARS OF OBETICHOLIC ACID (OCA) THERAPY RESULTS IN HISTOLOGICAL IMPROVEMENTS IN PATIENTS WITH PRIMARY BILIARY CHOLANGITIS: FURTHER ANALYSIS OF THE POISE BIOPSY SUBSTUDY. (25th March 2019) - Bowlus, C.L.; Pockros, P.; Kremer, A.; Pares, A.; Forman, L.M.; Drenth, J.P.; Ryder, S.; Floreani, A.; Terracciano, L.; Jin, Y.; Lieberman, A.; Pencheck, R.; et al.