1. Department of Haematology Haemostasis, Oncology and Stem Cell Transplantation Hannover Medical School Hannover Germany
2. Institute for Experimental Haematology and Transfusion Medicine University Hospital Bonn Bonn Germany
3. Haemostasis Centre Duisburg Germany
4. Clinical and Molecular Haemostasis Department of Paediatrics and Adolescent Medicine University Hospital Frankfurt Frankfurt Germany
5. University Medical Centre Hamburg‐Eppendorf Hamburg Germany
6. Division of Haemostaseology Medical Department I University Hospital Leipzig Leipzig Germany