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\bibitem{Mathei_etal2002} Mathe{\"\i}, C., Buntinx, F., \& Van Damme, P. (2002). Seroprevalence of hepatitis C markers among intravenous drug users in western European countries : a systematic review. \textit{Journal of viral hepatitis}, \textit{9}(3; 05/2002), 157--173.

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