1. Neuroendocrine UnitMassachusetts General Hospital Boston Massachusetts USA
2. Harvard Medical School Boston Massachusetts USA
3. Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER, Unidad 747), ISCIII Barcelona Spain
4. Department of Psychiatry, Faculty of MedicineUniversity of Geneva Geneva Switzerland
5. Child and Adolescent Psychiatry Division, Department of Child and Adolescent HealthGeneva University Hospital Geneva Switzerland
6. Division of Gastroenterology, Hepatology, and NutritionBoston Children's Hospital Boston Massachusetts USA
7. Eating Disorders Clinical and Research Program, Massachusetts General Hospital Boston Massachusetts USA
8. Department of PsychiatryHarvard Medical School Boston Massachusetts USA
9. Division of Pediatric EndocrinologyMassachusetts General Hospital for Children Boston Massachusetts USA