1. Diabetes Research Center Zwolle the Netherlands
2. Epidemiology Unit Department Innovation and Science Isala Hospital Zwolle the Netherlands
3. Department of Endocrinology University of Groningen and University Medical Center Groningen Groningen the Netherlands
4. Groningen Research Institute of Pharmacy University of Groningen Groningen the Netherlands
5. Department of Internal Medicine University of Groningen and University Medical Center Groningen Groningen the Netherlands