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\bibitem{Wuelser1990} W{\"u}lser, H. (1990). Remise de mat{\'e}riel d{\textquoteright}injection {\`a} des toxicomanes. \textit{Les cahiers du GREAT : revue du Groupement romand d{\textquoteright}{\'e}tudes sur l{\textquoteright}alcoolisme et les toxicomanies}, \textit{1/90}, 25--32.

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