1. Departments of Pediatrics
2. Department of Pediatrics, Erasmus MC-Sophia Children's Hospital, Rotterdam, Netherlands
3. Radiology
4. Radiology, Haga Teaching Hospital, Juliana Children's Hospital, The Hague, Netherlands
5. Department of Medical Statistics, Rijksuniversiteit Leiden, Leiden, Netherlands
6. Clinical Chemistry, Leiden University Medical Center, Leiden, Netherlands