1. Dutch Alzheimer Association, Amersfoort, the Netherlands
2. Netherlands Institute for Health Services Research (NIVEL), Utrecht, the Netherlands; Department of Public and Occupational Health, EMGO+/VUmc, Amsterdam, the Netherlands
3. Department of Medical Psychology, VU University medical center, Amsterdam, the Netherlands
4. Netherlands Institute for Health Services Research (NIVEL), Utrecht, Netherlands; Faculty of Social and Behavioural Sciences, University of Amsterdam, Amsterdam, the Netherlands; Pharos Knowledge and advisory center, Utrecht, the Netherlands
5. Pharos Knowledge and advisory center, Utrecht, the Netherlands
6. Alzheimer Nederland, Amersfoort, the Netherlands