Is stiffness reliable for the detection of liver fibrosis in HCV patients treated with direct acting antiviral drugs (DAAs)? A prospective cohort study. Issue 1 (February 2018) - Gaia, S.; Vanni, E.; Campion, D.; Rolle, E.; Stradella, D.; Valdivia, P. Cortegoso; Evangelista, A.; Ciancio, A.; Smedile, A.; Trapani, R.; Saracco, G.M.