1. Faculty of Health, Sports and Social Work Inholland University of Applied Sciences Amsterdam The Netherlands
2. Department of Medicine for Older People, Amsterdam Public Health Research Institute Amsterdam University Medical Centers Amsterdam Netherlands
3. University Network of Organizations for Care for Older People of Amsterdam University Medical Centers (UNO Amsterdam) Amsterdam Netherlands
4. Medical Library Vrije Universiteit Amsterdam Amsterdam The Netherlands
5. Zonnehuisgroep Amstelland Amstelveen The Netherlands
6. Department Family Medicine and Population Health, Faculty of Medicine and Health Sciences University of Antwerp Wilrijk Belgium
7. Tranzo, Tilburg School of Social and Behavioral Sciences Tilburg University Tilburg Netherlands