1. Lentis Research, Lentis Psychiatric Institute, 9725 AG Groningen, The Netherlands
2. University Medical Center Groningen, University of Groningen, 9713 GZ Groningen, The Netherlands
3. University Center of Psychiatry, University of Groningen, 9713 GZ Groningen, The Netherlands
4. Rob Giel Research Center, 9700 RB Groningen, The Netherlands
5. Addiction Care North Netherlands, 9728 JR Groningen, The Netherlands
6. NHL Stenden University of Applied Sciences, 8917 DD Leeuwarden, The Netherlands