O'Keefe, Daniel and Bluthenthal, Ricky N and Kral, Alex H and Aitken, Campbell K and McCormack, Angus and Dietze, Paul M (2019) Measures of harm reduction service provision for people who inject drugs. Bulletin of the World Health Organization, 97, (9), pp. 605-611. doi: 10.2471/BLT.18.224089.