1. Department of Medicine; Division of Hematology and Oncology; Thrombosis and Hemostasis Program; University of North Carolina at Chapel Hill; Chapel Hill NC USA
2. K. G. Jebsen Thrombosis Research and Expertise Center; University of Tromsø; Tromsø Norway
3. Clinical Division of Hematology and Hemostaseology; Department of Medicine I; Medical University of Vienna; Vienna Austria
4. Department of Pathology and Laboratory Medicine; University of North Carolina at Chapel Hill; Chapel Hill NC USA