Published on in Vol 13, No 4 (2011): Oct-Dec
1 Tactus Addiction Treatment, Enschede, Netherlands
2 Nijmegen Institute for Scientist-Practitioners in Addiction, Nijmegen, Netherlands
3 Department of Epidemiology, Medisch Spectrum Twente, Enschede, Netherlands
4 Department of Research Methodology, Measurement, and Data Analysis, University of Twente, Enschede, Netherlands
5 Behavioural Science Institute, Radboud University Nijmegen, Nijmegen, Netherlands