Durable response in the markers of cholestasis through 24 months of open-label extension with obeticholic acid in Italian patients with primary biliary cholangitis. Issue 1 (16th February 2017) - Andreone, P.; Floreani, A.; Invernizzi, P.; Mazzella, G.; Owens-Grillo, J.; Smoot Malecha, E.; MacConell, L.