1. Department of General Practice, Intellectual Disability Medicine Erasmus MC, University Medical Center Rotterdam The Netherlands
2. Middin, Care Organization for People with Intellectual Disabilities Rijswijk The Netherlands
3. Medical Department, Care and Service Centre for People with Intellectual Disabilities ASVZ Sliedrecht The Netherlands
4. Building Lighting Group Eindhoven University of Technology Eindhoven The Netherlands
5. Department of General Practice Erasmus MC, University Medical Center Rotterdam The Netherlands
6. Department of Sleep and Cognition Netherlands Institute for Neuroscience, an Institute of the Royal Netherlands Academy of Arts and Sciences Amsterdam The Netherlands
7. Dept. of Integrative Neurophysiology, Centre for Neurogenomics and Cognitive Research Vrije University, Neuroscience Campus Amsterdam Amsterdam The Netherlands
8. Dept. of Psychiatry Amsterdam Public Health Research Institute, Amsterdam UMC, Vrije University, and GGZ inGeest Amsterdam The Netherlands
9. Ipse de Bruggen, Care Organization for People with Intellectual Disabilities Zoetermeer The Netherlands