1. Best D, George S, Day E. The development of the drug treatment system in England. In: Day E, editor. Clinical topics in addiction. London: RCPsych; 2007. p. 14–28.
2. HM Government. Drug strategy 2010. Reducing demand, restricting supply, building recovery: supporting people to live a drug free life. London: Home Office; 2010.
3. McKeganey N, Bloor M, Robertson M, Neale J, MacDougall J. Abstinence and drug abuse treatment: results from the drug outcome research in Scotland study. Drugs Educ Prev Policy. 2006;13(6):537–50.
4. Day E, Mitcheson L. Psychosocial interventions in OST services: does the evidence provide a case for optimism or nihilism? Addiction. 2017;113(8):1329–36.
5. Drummond DC, Kouimtsidis C, Reynolds M, Russell I, Godfrey C, McCusker M, Coulton S, Parrott S, Davis P, Tarrier N et al: The effectiveness and cost effectiveness of cognitive behaviour therapy for opiate misusers in methadone maintenance treatment: a multicentre randomised controlled trial (UKCBTMM). Final report to the Department of Health Research and Development Directorate. In. London: Department of Health; 2004.