1. Diabetes Centre, Isala, Zwolle, the Netherlands
2. Center for eHealth Research and Disease Management, Department of Psychology, Health and Technology, University of Twente, Enschede, the Netherlands
3. University Medical Center Groningen, Department of General Practice, Groningen, the Netherlands
4. University of Groningen and University Medical Center Groningen, Department of Internal Medicine, Groningen, the Netherlands
5. Langerhans Medical Research Group, Zwolle, the Netherlands