1. American Hospital Association. (2000). Hospital statistics. Chicago: Author.
2. American Medical Association. (1999). Physicians fee schedule for Washington—Medicare.
3. Service-level costing of drug abuse treatment;Anderson;Journal of Substance Abuse Treatment,1998
4. The effectiveness of methadone maintenance treatment. Patients, programs, services, and outcome;Ball,1991
5. The cost-effectiveness of buprenorphine maintenance therapy for opiate addiction in the US;Barnett;Addiction,2001