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\bibitem{Kolar_etal1992} Kolar, A. F., Brown, B. S., Weddington, W. W., Haertzen, C. C., Michaelson, B. S., \& Jaffe, J. H. (1992). Treatment of cocaine dependence in methadone maintenance clients : a pilot study comparing the efficacy of desipramine and amantadine. \textit{International journal of the addictions}, \textit{27}(7), 849--868.

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