1. Division of Paediatric Haemostaseology Department of Paediatrics Univ.‐Hospital Carl Gustav Carus Technical University Dresden Germany
2. Division of Paediatric Haemato‐Oncology Department of Paediatrics Univ.‐Hospital Carl Gustav Carus Technical University Dresden Germany
3. Institute of Clinical Chemistry Univ.‐Hospital Carl Gustav Carus Technical University Dresden Germany
4. Medical Faculty Paediatric Haemato‐Oncology Technical University Dresden Germany