1. Department of Primary and Community Care, Intellectual Disabilities and Health Radboud University Medical Center, Radboud Institute for Health Sciences Nijmegen The Netherlands
2. Department of Primary and Community Care Radboud University Medical Center, Radboud Institute for Health Sciences Nijmegen The Netherlands
3. Department of General Practice, Intellectual Disability Medicine Erasmus MC, University Medical Center Rotterdam The Netherlands
4. Department of Physical Therapy University of Nevada Las Vegas NV USA