1. Impuls - Netherlands Center for Social Care Research; Radboud Institute for Health Sciences; Radboud University Medical Center; Nijmegen The Netherlands
2. Amsterdam University of Applied Sciences; Amsterdam The Netherlands
3. Department of Primary and Community Care; Radboud Institute for Health Sciences; Radboud University Medical Center; Nijmegen The Netherlands
4. IVO; Addiction Research Institute; Rotterdam The Netherlands
5. Erasmus Medical Centre; Rotterdam the Netherlands
6. Department of Health Promotion; Maastricht University; the Netherlands