Authors' reply

Affiliation

• ¹ Sarah Byford, Centre for the Economics of Mental and Physical Health, Box P024, Institute of Psychiatry, De Crespigny Park, London SE5 8AF, UK. Email: [email protected]; Barbara Barrett, Centre for the Economics of Mental and Physical Health, Nicola Metrebian, Addictions Department, National Addiction Centre, Institute of Psychiatry, King's College London, UK; Teodora Groshkova, European Monitoring Centre for Drugs and Drug Addiction, Lisbon, Portugal; Maria Cary, Centre for the Economics of Mental and Physical Health, Vikki Charles, Addictions Department, National Addiction Centre, Institute of Psychiatry, King's College London, UK; Nicholas Lintzeris, The Langton Centre, South Eastern Sydney Local Health District, NSW Health, Australia; John Strang, Addictions Department, National Addiction Centre, Institute of Psychiatry, King's College London, UK.