1. Department of Pathology and NeuropathologyTimone HospitalMarseille France
2. INSERM UMR911, Aix‐Marseille University (AMU)Marseille France
3. Department of PathologyRadboud University Medical CenterNijmegen The Netherlands
4. Department of PathologyStichting PAMMEindhoven The Netherlands
5. Department of NeuropathologyPitié‐Salpêtrière HospitalParis France
6. Department of PathologyMaastricht University Medical CenterMaastricht The Netherlands
7. Department of PathologyVU University Medical CenterAmsterdam The Netherlands
8. Department of PathologyPrincess Máxima Center for Pediatric Oncology, Utrecht The Netherlands
9. University Medical CenterUtrecht The Netherlands