1Substance Abuse and Mental Health Services Administration (SAMHSA), 1/24/2003. The NHSDA Report: Characteristics of New Marijuana Users, last referenced 9/5/2007.
2SAMHSA, 10/22/2004. The NSDUH Report: Alcohol Dependence or Abuse and Age at First Use, last referenced 9/5/2007.
3, 4SAMHSA, 2004. Keeping Youth Drug Free, last referenced 9/5/2007.
5Western Regional Center for the Application of Prevention Technologies. Risk Factors, last referenced 9/5/2007.
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