1. Div. Endocrinology; MUMC+, CARIM and CAPHRI Institutes; Maastricht The Netherlands
2. Department of Surgery; Ziekenhuisgroep Twente; Almelo and Hengelo The Netherlands
3. Department of Endocrinology; University Hospital of Malmö; Malmö Sweden
4. Geneva University Hospitals and Faculty of Medicine, Geneva; Switzerland, and University of Oxford; Oxford UK
5. IWGDF; Heemstede The Netherlands