1. Diabetes Research Center Vrije Universiteit Brussel (VUB) Brussels Belgium
2. Diabetes Clinic Universitair Ziekenhuis Brussel (UZ Brussel) Brussels Belgium
3. Beta Cell Bank Universitair Ziekenhuis Brussel (UZ Brussel) Brussels Belgium
4. Department of Surgery Universitair Ziekenhuis Brussel (UZ Brussel) Brussels Belgium
5. Department Internal Medicine Leiden University Medical Center – LUMC Leiden The Netherlands
6. Department of Endocrinology University Hospitals Leuven Leuven Belgium