1. Department of Public Health Erasmus University Medical Centre Rotterdam the Netherlands
2. IVO Addiction Research Institute The Hague the Netherlands
3. Radboud Institute for Health Sciences, Impuls ‐ Netherlands Centre for Social Care Research Radboud University Medical Centre Nijmegen the Netherlands
4. Department of Public and Occupational Health, Expertise Centre for Palliative Care VU University Medical Centre, Amsterdam Public Health Research Institute Amsterdam the Netherlands
5. School of Social and Behavioural Sciences, Tranzo Scientific Centre for Care and Welfare Tilburg University Tilburg the Netherlands