Pocuca, Nina and Mefodeva, Valeriya and Connor, Jason P and Campbell, Gabrielle and Hides, Leanne (2026) Severity of polysubstance use among young people seeking drug and alcohol treatment, and social and mental health correlates: an observational study. Substance Use & Misuse, 61, (12), pp. 2064-2071. https://doi.org/10.1080/10826084.2026.2639050.