1. Department of Clinical Medicine Thrombosis Research Center (TREC) UiT—The Arctic University of Norway Tromsø Norway
2. Department of Hematology Erasmus MC, Erasmus University Medical Center Rotterdam the Netherlands
3. Star‐shl Anticoagulation Clinic Rotterdam The Netherlands
4. Department of Thrombosis and Haemostasis Leiden University Medical Center Leiden the Netherlands
5. Department of Clinical Epidemiology Leiden University Medical Center Leiden the Netherlands
6. Division of Internal Medicine University Hospital of North Norway Tromsø Norway