Additional file 5: of High variability of HIV and HCV seroprevalence and risk behaviours among people who inject drugs: results from a cross-sectional study using respondent-driven sampling in eight German cities (2011–14) WenzBenjamin NielsenStine GassowskiMartyna Santos-HövenerClaudia CaiWei RossR. BockClaus-Thomas RatschBoris-Alexander KüchererClaudia BannertNorbert BremerViviane HamoudaOsamah MarcusUlrich ZimmermannRuth 2016 Proportion of participants born in Germany. (TIF 628 kb)