1 Division of Medical Oncology, Cantonal Hospital Lucerne, Lucerne, Switzerland.
2 Department of Pathology, Cantonal Hospital Lucerne, Lucerne, Switzerland.
3 Pediatrics III, Department of Pediatric Oncology and Hematology, University Hospital Essen, Essen, Germany.
4 Eye Cancer Genetics, Institute of Human Genetics, University Hospital Essen, Essen, Germany.
5 Department of Ophthalmology, Cantonal Hospital Lucerne, Lucerne, Switzerland.
6 Jules-Gonin Eye Hospital, University of Lausanne, Lausanne, Switzerland.
7 Pediatric Hematology Oncology Unit, University Hospital CHUV, Lausanne, Switzerland.
8 Department of Neuropathology, University Hospital Heidelberg, Heidelberg, Germany.
9 Clinical Cooperation Unit Neuropathology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany.
10 Hopp Children's Cancer Center (KiTZ), Heidelberg University Hospital, Heidelberg, Germany.
11 Clinical Cooperation Unit Pediatric Oncology, German Consortium for Translational Cancer Research (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany.
12 KiTZ Clinical Trial Unit (ZIPO), Department of Pediatric Hematology and Oncology, Heidelberg University Hospital, Heidelberg, Germany.