“…Our interpretation of an enabling policy environment drew on guidelines generated by WHO [35], UNAIDS [36], international NGOs [37], and peerreviewed papers in this field [9,12,14,38]. As outlined in box A.1, the core items of the index included country-level indicators of (a) coordinated national strategy for HIV prevention and drug use (indicated by evidence of explicit inclusion of "harm reduction" in national-level strategy and monitoring and evaluating HIV epidemics); (b) meaningful engagement of stakeholders in HIV prevention policy formation and programming (indicated by evidence of a national organization of drug users); and (c) evidence-based HIV prevention intervention approaches (indicated by presence of OST and NSP, presence of OST and NSP in prison settings, and evidence of deemphasizing criminalization through the use of administrative penalties for drug use possession for personal use).…”