1. University Medical Center Hamburg-Eppendorf, Department of Diagnostic and Interventional Radiology; Hamburg Germany
2. UCSF Benioff Children's Hospital and Research Center Oakland, Department of Hematology; Oakland California USA
3. University Medical Center Hamburg-Eppendorf, Department of Pediatric Hematology/Oncology; Hamburg Germany
4. Siemens Healthcare GmbH; Hamburg Germany