1. Division of Internal Medicine Department of Clinical Sciences Danderyd Hospital Karolinska Institutet Stockholm Sweden
2. Institute of Vascular Biology and Thrombosis Research Center for Physiology and Pharmacology Medical University of Vienna Vienna Austria
3. Division of Hematology/Oncology Department of Medicine UNC Blood Research Center University of North Carolina at Chapel Hill Chapel Hill NC USA
4. Department of Pathology and Laboratory Medicine UNC Blood Research Center University of North Carolina at Chapel Hill Chapel Hill NC USA