1. Department I – General Pediatrics, Hematology/Oncology Children’s HospitalUniversity Hospital Tübingen Tübingen Germany
2. Department of Pediatrics University Frankfurt Frankfurt Germany
3. Department of Pediatric Oncology/Hematology Charité Medical Center Humboldt University Berlin Berlin Germany
4. Department of Pediatrics I Christian‐Albrechts‐University of KielUniversity Medical Center Schleswig‐Holstein Kiel Germany
5. Research and Development Amgen Research (Munich) GmbH Munich Germany
6. LMU Dr. von Hauner University Children’s Hospital Munich Germany