1. National Center for Tumor Diseases (NCT), Dresden, Germany;
2. Pediatric Hematology and Oncology, Department of Pediatrics, University Hospital Carl Gustav Carus, TU Dresden, Dresden, Germany;
3. Department for Pediatric Oncology, Hematology and Clinical Immunology, Medical Faculty, Heinrich-Heine University, Düsseldorf, Germany; and
4. German Cancer Consortium (DKTK), partnering site Essen/Düsseldorf, Germany