1. Youth risk behavior surveillance—United States, 1997;MMWR CDC Surveill Summ,1998
2. Mortality trends and leading causes of death among adolescents and young adults—United States, 1979–1988;MMWR Morb Mort Wkly Rep,1993
3. Johnston L, O’Malley P, Bachman J. Drug use by young people begins to turn downward. Available at: http://www.isr.umich.edu/src/mtf/. Accessed 1998.
4. Guidelines for Adolescent Preventive Services (GAPS),1995
5. Screening and Assessing Adolescents for Substance Use Disorders. Treatment Improvement Protocol (TIP) Series. Vol. 31. DHHS Pub. No. (SMA) 99-3282;Winters,1999