1. Diabetes Centre; Isala; Zwolle The Netherlands
2. Langerhans Medical Research Group; Zwolle The Netherlands
3. Department of Internal Medicine; University of Groningen, University Medical Center Groningen; Groningen The Netherlands
4. Meetpunt Kwaliteit; Eindhoven The Netherlands
5. Praktijkondersteuning Zuidoost-Brabant; Veldhoven The Netherlands
6. Julius Center for Health Sciences and Primary Care; University Medical Center Utrecht; Utrecht The Netherlands
7. InEen; Utrecht The Netherlands