Munro, Alison, Booth, H., Gray, N., Love, J., Mohan, A., Tang, J. & MacGillivray, S. 2021, 'Understanding the impacts of novel coronavirus outbreaks on people who use drugs: a systematic review to inform practice and drug policy responses to COVID-19', International Journal of Environmental Research and Public Health, 18(16), article no: 8470. https://doi.org/10.3390/ijerph18168470