The Massachusetts Department of Public Health supported the development of these Practice Guidelines through a contract with the Division on Addiction at the Cambridge Health Alliance, a Harvard Medical School teaching hospital. The principle authors of these evidence-based guidelines were Drs. Debi A. LaPlante, Heather, M. Gray, and Howard J. Shaffer. These guidelines were derived, in part, from Korn, D.A., & Shaffer, H. J. (2004). The Massachusetts Department of Public Health is fully responsible for this web site.