1. Department of Thrombosis and Hemostasis Leiden University Medical Center Leiden The Netherlands
2. Department of Internal Medicine Haaglanden Medical Center The Hague The Netherlands
3. Department of Clinical Sciences Karolinska InstituteDanderyd Hospital Stockholm Sweden
4. Internal Medicine Clinic Østfold Hospital Trust Østfold Norway
5. Department of Haematology Oslo University Hospital and Institute of Clinical MedicineUniversity of Oslo Oslo Norway
6. Department of Radiology Østfold Hospital Trust Østfold Norway
7. Department of Radiology Leiden University Medical Center Leiden The Netherlands