1. Department of Pediatric Hematology/Oncology/Hemostaseology, Center for Pediatric and Adolescent Medicine University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
2. Division of Pediatric Epidemiology, Institute of Medical Biostatistics, Epidemiology and Informatics (IMBEI) University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany
3. Division of Childhood Cancer Epidemiology, Institute of Medical Biostatistics, Epidemiology and Informatics (IMBEI) University Medical Center of the Johannes Gutenberg University Mainz Mainz Germany