1. Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich (USZ), and University of Zurich (UZH) , CH-8091 Zurich , Switzerland
2. Department of Pathology and Molecular Pathology, University Hospital Zurich , CH-8091 Zurich , Switzerland
3. Department of Internal Medicine I, Division of Endocrinology and Diabetes, University Hospital, University of Würzburg , 97080 Würzburg , Germany
4. Department of Internal Medicine III, University Hospital Carl Gustav Carus, Technische Universität Dresden , 01307 Dresden , Germany
5. Division of Endocrinology, Department of Internal Medicine, Radboud University Medical Center , 6525 GA Nijmegen , Netherlands
6. Hereditary Endocrine Cancer Group, Spanish National Cancer Research Center (CNIO) , Madrid , Spain
7. Centro de Investigación Biomédica en Red de Enfermedades Raras , Madrid , Spain
8. First Department of Medicine, University Medical Center Schleswig-Holstein , 23538 Lübeck , Germany
9. Department of Medicine IV, University Hospital, Ludwig-Maximilians-University Munich , 80336 Munich , Germany
10. Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Carl Gustav Carus, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse , 01307 Dresden , Germany
11. Department of Visceral and Transplantation Surgery, University Hospital , 8091 Zürich , Switzerland
12. Institute for Diabetes and Cancer, Helmholtz Zentrum München , 85764 Neuherberg , Germany
13. Department of Biology and Biotechnology, University of Pavia , 27100 Pavia , Italy
14. Department of Radiopharmaceutical and Chemical Biology, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf (HZDR) , Dresden , Germany
15. Faculty of Chemistry and Food Chemistry, School of Science, Technische Universität Dresden , Dresden , Germany
16. Section on Medical Neuroendocrinology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health , Rockville, MD 20847 , USA
17. Green Templeton College, University of Oxford , Oxford , UK
18. NET Unit, ENETS Centre of Excellence, Royal Free Hospital , London , UK