1. Charité – Universitätsmedizin Berlin Corporate Member of Freie Universität Berlin, Humboldt‐Universität zu Berlin Berlin Institute of Health (BIH) Berlin Germany
2. Berlin Institute of Health, BIH Berlin Germany
3. Boyne Research Institute Drogheda Ireland
4. University Hospital Essen Pediatrics III West German Cancer Centre Essen Germany
5. German Cancer Research Centre (DKTK) Heidelberg Germany
6. Department of Paediatrics and Adolescent Medicine University Medical Center Ulm Ulm Germany
7. University Hospital Brno & International Clinical Research Center (FNUSA‐ICRC) Masaryk University Brno Czech Republic
8. Motol Teaching Hospital Prague Czech Republic
9. Department of Paediatric Oncology, Haematology and Immunology Medical Faculty Heinrich‐Heine‐University of Düsseldorf Düsseldorf Germany
10. Department of Paediatrics and Adolescent Medicine Medical University of Graz Graz Austria
11. Paediatric Oncology and Hematology University Hospital for Children and Adolescents University of Lübeck Lübeck Germany
12. Medical University of Bialystok Białystok Poland
13. Department of Pediatrics, Hematology and Oncology Medical University of Gdansk Gdansk Poland
14. Helios Kliniken Berlin‐Buch Klinik für Kinder‐ und Jugendmedizin Chemnitz Germany