1. Department of Laboratory Medicine, Laboratory of Haematology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
2. ECAT Foundation, Leiden, The Netherlands
3. Department of Thrombosis and Haemostasis, University Medical Centre Leiden, Leiden, The Netherlands
4. Department of Haematology, Institute of Clinical Pathology and Medical Research, Westmead Hospital, Westmead, New South Wales, Australia