Aim 3: To determine potential moderators and mediators of the impact of HCV GET-UP on HCV treatment uptake, using a sequential explanatory design. First, we will perform exploratory quantitative analyses to determine if there are specific patient characteristics (demographic, clinical) that moderate the intervention effect, and if there are mediators (reduced stigma, peer support, increased self-efficacy) of HCV GET-UP's impact on treatment uptake. Second, we will perform semi-structured interviews with 20 participants randomized to HCV-GET UP to explore potential moderators/mediators deduced from quantitative analyses.