1. Department of Pediatric Oncology, University Medicine Greifswald, Greifswald, Germany
2. Great Ormond Street Hospital, Department of Pediatric Hematology and Oncology, London, United Kingdom
3. Department of Pediatric Hematology and Oncology, Gaslini Institute, Genova Italy
4. Department of Pediatric and Adolescent Oncology Villejuif, Gustave Roussy Université Paris-Sud, France
5. Apeiron Biologics, Vienna, Austria
6. Department of Radiology and Nuclear Medicine, University Medicine Greifswald, Greifswald, Germany
7. Department of Pediatric Surgery, University Medicine Greifswald, Greifswald, Germany
8. St. Anna Children's Hospital, Department of Pediatric Hematology and Oncolgoy, Vienna, Austria