1. Department of Pediatrics, Antwerp University Hospital, University of Antwerp, Antwerp, Belgium
2. Department of Neurosurgery, Antwerp University Hospital, University of Antwerp, Antwerp, Belgium
3. Division of Nuclear Medicine, University Hospital Leuven, Leuven, Belgium
4. Department of Pediatric Hematology and Oncology, Antwerp University Hospital, University of Antwerp, Antwerp, Belgium