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Contingency management for cocaine treatment: cash vs. vouchers.
Festinger DS, Dugosh KL, Kirby KC, Seymour BL. Festinger DS, et al. J Subst Abuse Treat. 2014 Aug;47(2):168-74. doi: 10.1016/j.jsat.2014.03.001. Epub 2014 Mar 6. J Subst Abuse Treat. 2014. PMID: 24746956 Free PMC article. Clinical Trial.