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O'Leary, Chris and Ralphs, Rob and Stevenson, Jennifer and Smith, Andrew and Harrison, Jordan and Kiss, Zsolt and Armitage, Harry (2024) The effectiveness of abstinence-based and harm reduction-based interventions in reducing problematic substance use in adults who are experiencing homelessness in high income countries: a systematic review and meta-analysis. Campbell Systematic Reviews, 20, (2), e1396. https://doi.org/10.1002/cl2.1396.