1. Department of Pediatric Hematology and Oncology, University Medical Center Hamburg-Eppendorf (UKE), University of Hamburg, Hamburg, Germany
2. Center for Anesthesiology and Intensive Care Medicine, Department of Intensive Care Medicine, University Medical Center Hamburg-Eppendorf (UKE), University of Hamburg, Hamburg, Germany
3. Medilys Central Laboratory Coagulation, Asklepios Clinic Altona, Hamburg, Germany