This research was supported by the Substance Abuse and Mental Health Services Administration and grant 5 P50 DA 10233 from the National Institute on Drug Abuse to the Brandeis/Harvard Center for Managed Care and Drug Abuse. The authors thank Mady Chalk, Ph.D., Sarah Wattenberg, L.C.S.W.-C., Frank McCorry, Ph.D., Doreen Cavanaugh, Ph.D., Pat Harrison, Ph.D., and Connie Weisner, Dr.P.H.