Hepatitis C virus infection epidemiology among people who inject drugs in Europe: a systematic review of data for scaling up treatment and prevention. oleh Lucas Wiessing, Marica Ferri, Bart Grady, Maria Kantzanou, Ida Sperle, Katelyn J Cullen, EMCDDA DRID group, Angelos Hatzakis, Maria Prins, Peter Vickerman, Jeffrey V Lazarus, Vivian D Hope, Catharina Matheï