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APA Citation
Shevlin, M., McElroy, E., Murphy, J., Hyland, P., Vallieres, F., Elklit, A., & Christoffersen, M. (2017). cannabis and psychosis: the impact of polydrug use. Drugs and alcohol today, 17(3), 186–194. http://access.bl.uk/ark:/81055/vdc_100048757188.0x00001c