1. Utrecht University, Utrecht, the Netherlands
2. Queen’s University, Kingston, Canada
3. Addiction Info Switzerland, Research Institute, Lausanne, Switzerland
4. University of Lausanne, Lausanne, Switzerland
5. Behavioral Science Institute (BSI), Radboud University, Nijmegen, the Netherlands
6. Ghent University, Ghent, Belgium
7. National University of Ireland, Galway, Ireland
8. University of Akureyri, Akureyri, Iceland