1. ENDOC Center for Endocrine Tumors; Hamburg Germany
2. Oslo University Hospital; Section of Specialized Endocrinology, Medical Clinic B and Faculty of Medicine, University of Oslo; Oslo Norway
3. Department of Endocrinology; Diabetes and Nutrition, Charité-University Medicine Berlin, Campus Benjamin Franklin; Berlin Germany
4. Medizinische Klinik IV; Campus Innenstadt, University of Munich; Munich Germany
5. CHUM, Notre-Dame Hospital; Montreal Quebec Canada
6. Division of Endocrinology and Metabolism; Stanford University School of Medicine; Stanford CA USA
7. Novartis Pharmaceuticals Corporation; East Hanover NJ USA
8. CHU de Liège; Domaine Universitaire du Sart-Tilman Liège; Liège Belgium