1. Olgahospital, Zentrum für Kinder‐ Jugend und Frauenmedizin Klinikum Stuttgart Pediatrics 5 (Oncology, Hematology, Immunology) Stuttgart Germany
2. University of Tuebingen Tuebingen Germany
3. Department of Pediatric Hematology and Oncology University of Muenster Muenster Germany
4. Department for Children and Adolescents University Hospital of Frankfurt Frankfurt/M Germany