Variable short duration treatment versus standard treatment, with and without adjunctive ribavirin, for chronic hepatitis C: the STOP-HCV-1 non-inferiority, factorial RCT de réir Cooke, GS, Pett, SL, McCabe, L, Jones, C, Gilson, R, Verma, S, Ryder, SD, Collier, JD, Barclay, ST, Ala, A, Bhagani, S, Nelson, M, Ch'Ng, CL, Stone, B, Wiselka, M, Forton, D, McPherson, S, Halford, R, Nguygen, D, Smith, D, Ansari, MA, Ainscough, H, Dennis, E, Hudson, F, Barnes, EJ, Walker, AS