1. Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
2. Hamilton Regional Laboratory Medicine Program, Special Coagulation Laboratory, Hamilton, Ontario, Canada
3. Department of Medicine, McMaster University, Hamilton, Ontario, Canada
4. Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota
5. University of Wisconsin Hospital and Clinics, UWHC Special Coagulation Laboratory, Madison, Wisconsin
6. Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
7. ECAT Foundation, Leiden, The Netherlands