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Shoptaw S, Huber A, Peck J, Yang X, Liu J, Jeff Dang, Roll J, Shapiro B, Rotheram-Fuller E, Ling W.Shoptaw S, et al. Among authors: ling w.Drug Alcohol Depend. 2006 Oct 15;85(1):12-8. doi: 10.1016/j.drugalcdep.2006.03.005. Epub 2006 Apr 18.Drug Alcohol Depend. 2006.PMID: 16621339Clinical Trial.
Shoptaw S, Heinzerling KG, Rotheram-Fuller E, Steward T, Wang J, Swanson AN, De La Garza R, Newton T, Ling W.Shoptaw S, et al. Among authors: ling w.Drug Alcohol Depend. 2008 Aug 1;96(3):222-32. doi: 10.1016/j.drugalcdep.2008.03.010. Epub 2008 May 12.Drug Alcohol Depend. 2008.PMID: 18468815Free PMC article.Clinical Trial.