1. Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, The Netherlands.
2. Rotterdam Thyroid Center, Department of Internal Medicine, Erasmus University Medical Center, Rotterdam, The Netherlands.
3. Department of Pediatric Endocrinology, Emma Children's Hospital, Academic Medical Center, Amsterdam, The Netherlands.
4. Department of Endocrinology and Metabolism, Amsterdam University Medical Center, Amsterdam, The Netherlands.
5. Department of Pediatrics, St. Lucas Andreas Hospital, Amsterdam, The Netherlands.
6. Practice of Pediatric Physiotherapy, Sport Medical Center, Amsterdam, The Netherlands.