1. Department of Pediatric Endocrinology, Wilhelmina Children's Hospital, University Medical Center Utrecht, The Netherlands.
2. Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands.
3. Division of Endocrinology, Department of Pediatrics, Hospital for Sick Children, University of Toronto, Toronto, Canada.
4. Department of Diagnostic Imaging, Hospital for Sick Children, Toronto, Canada.