1. Department of Pathology; VU University Medical Centre; Amsterdam The Netherlands
2. Department of Clinical Genetics; Leiden University Medical Centre; Leiden The Netherlands
3. Dutch Pathology Registry; Houten The Netherlands
4. Department of Clinical Genetics; VU University Medical Centre; Amsterdam The Netherlands
5. Department of Pathology, Princess Máxima Centre for Pediatric Oncology; Utrecht and University Medical Centre Utrecht; Utrecht The Netherlands
6. Department of Pediatrics; Amsterdam University Medical Centre; Amsterdam The Netherlands