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\bibitem{Mandell_etal1994} Mandell, W., Vlahov, D., Latkin, C. A., Oziemkowska, M., \& Cohn, S. (1994). Correlates of needle sharing among injection drug users. \textit{American journal of public health : official journal of the American Public Health Association}, \textit{84}(6; 06/1994), 920--923.

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