Monitoring quality and coverage of harm reduction services for people who use drugs: a consensus study oleh Lucas Wiessing, Marica Ferri, Vendula Běláčková, Patrizia Carrieri, Samuel R. Friedman, Cinta Folch, Kate Dolan, Brian Galvin, Peter Vickerman, Jeffrey V. Lazarus, Viktor Mravčík, Mirjam Kretzschmar, Vana Sypsa, Ana Sarasa-Renedo, Anneli Uusküla, Dimitrios Paraskevis, Luis Mendão, Diana Rossi, Nadine van Gelder, Luke Mitcheson, Letizia Paoli, Cristina Diaz Gomez, Maitena Milhet, Nicoleta Dascalu, Jonathan Knight, Gordon Hay, Eleni Kalamara, Roland Simon, EUBEST working group, Catherine Comiskey, Carla Rossi, Paul Griffiths