1. Department of Geriatric Medicine Radboud University Medical Centre Nijmegen The Netherlands
2. Donders Institute for BrainCognition and Behavior Nijmegen The Netherlands
3. Radboud Alzheimer Centre Nijmegen The Netherlands
4. Sleep Medicine Centre Kempenhaeghe Heeze The Netherlands
5. Eindhoven University of Technology Eindhoven The Netherlands
6. Department of Medical Psychology Radboud University Medical Centre Nijmegen The Netherlands
7. Vincent van Gogh Institute for Psychiatry Venray The Netherlands