Maintenance work on the ZORA databases is scheduled for Wednesday 22 May 2019 from 20:00-22:00. During this period ZORA and JDB will not be available. Thank you for your understanding.
Uchtenhagen, Ambros (1999). COST A-6's contribution to treatment evaluation. In: Baker, O; Mounteney, M. Evaluating the treatment of drug abuse in the European Union. Lisbon: European Monitoring Centre on Drugs and Drug Addiction, 85-88.