1. Hopp Children’s Cancer Center, Heidelberg, Germany
2. DKFZ, Heidelberg, Germany
3. Dept. of Neuropathology, Heidelberg, Germany
4. Dept. of Neuropathology Tübingen, Tübingen, Germany
5. Dept. of Neuropathology Basel, Basel, Switzerland
6. Department of Pathology Odense, Odense, Denmark
7. Department of Paediatrics and Adolescent Medicine Rigshospitalet, Copenhagen, Denmark
8. Dept. of Neurosurgery, Heidelberg, Germany
9. Dept. of Neurology, Heidelberg, Germany