1. Department of General Practice and Elderly Care Medicine University of Groningen University Medical Centre Groningen Groningen The Netherlands
2. Health Technology and Services Research Department Technical Medical Centre University of Twente Enschede The Netherlands
3. Tactus Verslavingszorg Deventer The Netherlands
4. Department of Public Health and Primary Care Leiden University Medical Center Leiden The Netherlands
5. Department of Medicine for Older People Amsterdam Public Health Research Institute Amsterdam UMC ‐ Vrije Universiteit Amsterdam Amsterdam The Netherlands
6. Quality Department Korian Zorg, Korian Group Arnhem The Netherlands
7. Department of Primary and Community Care Radboud University Medical Center Nijmegen The Netherlands
8. Joachim en Anna Center for Specialized Geriatric Care Nijmegen The Netherlands