1. Department of Global Health, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
2. ASC Academics, Groningen, The Netherlands
3. Health-Ecore B.V, Zeist, The Netherlands
4. Amsterdam University Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
5. Tunnis General Practitioners, Sint Anthonis, The Netherlands
6. Department of Management Sciences, Open Universiteit, Heerlen, The Netherlands