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\bibitem{Dauwalder_etal1997} Dauwalder, J. - P., Cattaneo, A., \& Poncioni-Derigo, R. (1997). \textit{Etude comparative des programmes m{\'e}thadone en Suisse romande : rapport final}. Gen{\`e}ve: Etude comparative des programmes m{\'e}thadone en Suisse romande (ECPM).

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