1. Université libre de Bruxelles (ULB), Hôpital Universitaire de Bruxelles (HUB), CUB Hôpital Erasme, Department of Endocrinology, Route de Lennik, Brussels, Belgium
2. Department of Endocrinology, Cliniques Universitaires Saint Luc, Brussels, Belgium
3. Department of Endocrinology-Diabetology-Metabolism, Universitair Ziekenhuis Antwerpen & University of Antwerp, Drie Eikenstraat, Edegem, Belgium
4. Department of Endocrinology, Academisch Ziekenhuis Sint-Jan Brugge – Oostende AV, Ruddershove, Brugge, Belgium
5. Department of Endocrinology, Ghent Universitary Hospital, C. Heymanslaan, Gent, Belgium
6. Department of Endocrinology, Onze-Lieve Vrouw Ziekenhuis, Moorselbaan, Aalst, Belgium
7. Department of Endocrinology, Universitair Ziekenhuis Brussel, Laarbeeklaan, Brussels, Belgium
8. Department of Endocrinology, Cliniques Universitaires de Liège, Avenue de l’hôpital, Liège, Belgium
9. Department of Endocrinology, CHU UCL Namur - Godinne, Avenue Docteur Gaston Thérasse, Yvoir, Belgium