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\bibitem{Thorpe_etal2002} Thorpe, L. E., Ouellet, L. J., Hershow, R., Bailey, S. L., Williams, I. T., Williamson, J., et al. (2002). Risk of hepatitis C virus infection among young adult injection drug users who share injection equipment. \textit{American journal of epidemiology}, \textit{155}(7), 645--653.

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