1. Department of Pediatric Endocrinology, Wilhelmina Children’s Hospital, University Medical Center Utrecht, Utrecht, The Netherlands
2. Dutch Pituitary Foundation, Nijkerk, The Netherlands
3. Department of Endocrinology, Leiden University Medical Center, Leiden, The Netherlands
4. Endo-ERN European Reference Network on Rare endocrine conditions
5. Division of Endocrinology, Metabolism and Diabetes, First Department of Pediatrics, National and Kapodistrian University of Athens Medical School, Aghia Sophia Children's Hospital, Athens, Greece
6. Division of Endocrinology and Metabolism, Center for Clinical, Experimental Surgery and Translational Research, Biomedical Research Foundation of the Academy of Athens, Athens, Greece