1. Department of Pathology Leiden University Medical Center Leiden the Netherlands
2. Princess Máxima Center for Pediatric Oncology Utrecht the Netherlands
3. Department of Pathology Amsterdam University Medical Centers Amsterdam the Netherlands
4. Department of Pathology Erasmus MC University Medical Center Rotterdam Rotterdam the Netherlands
5. Department of Pathology University Medical Center Groningen Groningen the Netherlands
6. Department of Pathology VieCuri Medical Center Venlo the Netherlands
7. Palga (Dutch Nationwide Pathology Databank) Houten the Netherlands
8. Department of Internal Medicine, Section Clinical Immunology Erasmus MC University Medical Center Rotterdam Rotterdam the Netherlands