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\bibitem{Rehm_etal2001} Rehm, J., Gschwend, P., Steffen, T., Gutzwiller, F., Dobler-Mikola, A., \& Uchtenhagen, A. (2001). Feasibility, safety, and efficacy of injectable heroin prescription for refractory opioid addicts : a follow-up study. \textit{The Lancet}, \textit{358}(27.10.2001), 1417--1420.

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