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APA Citation
Bellis, M. A., Beynon, C., Millar, T., Ashton, J. R., Thomson, R., Djuretic, T., & Taylor, A. (2001). unexplained illness and deaths among injecting drug users in England: a case control study using Regional Drug Misuse Databases. Journal of epidemiology and community health, 55(11), 843–844. http://access.bl.uk/ark:/81055/vdc_100135545638.0x00002a