1 Pediatric Molecular Neuro-Oncology Research, Division of Oncology, Children's Research Center, University Children's Hospital Zürich, Zürich, Switzerland.
2 Division of Oncology, University Children's Hospital Zürich, Zürich, Switzerland.
3 Pediatric Molecular Neuro-Oncology Research, Division of Oncology, Children's Research Center, University Children's Hospital Zürich, Zürich, Switzerland. Martin.Baumgartner@kispi.uzh.ch.