Triangle Institute), Research Triangle Park, North Carolina. Work by RTI was performed under Contract No. 283-2004-00022. At SAMHSA, Douglas Wright was responsible for the content, analysis, and writing of the report, and Joseph C. Gfroerer reviewed and provided numerous suggestions and improvements on its content and format. At RTI, Neeraja Sathe was responsible for the writing of the report, and Ralph E. Folsom was responsible for the overall methodology and estimation for the model-based Bayes estimates and prediction intervals. The following staff wer
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