Silibinin is a potent antiviral agent in patients with chronic hepatitis C not responding to pegylated interferon/ribavirin therapy - Ferenci, P; Scherzer, T M; Kerschner, H; Rutter, K; Beinhardt, S; Hofer, H; Schöniger-Hekele, M; Holzmann, H; Steindl-Munda, P (J Gastroenterol, 2008)