1. Department of Primary and Community Care, Radboud University Medical Center, Nijmegen, The Netherlands
2. ‘Joachim en Anna’, Center for Specialized Geriatric Care, Nijmegen, The Netherlands
3. Radboudumc Alzheimer Center, Nijmegen, The Netherlands
4. Department of Public Health and Primary Care, Leiden University Medical Center, Leiden, The Netherlands
5. Department of Rehabilitation, Radboud University Medical Center, Donders Institute for Brain Cognition and Behaviour, Nijmegen, The Netherlands
6. Zorggroep Maas & Waal, Beneden-Leeuwen, The Netherlands
7. Groenhuysen, Center for Geriatric Care, Roosendaal, The Netherlands
8. General Medical Practice, Velp, The Netherlands