1. Thrombosis and Hemostasis Unit Hematology Institute Soroka University Medical Center Faculty of Health Sciences Ben Gurion University of the Negev Beer Sheva Israel
2. Center for Clinical Epidemiology Jewish General HospitalMcGill University Montreal Canada
3. Department of Epidemiology, Biostatistics and Occupational Health McGill University Montreal Canada
4. Division of Internal Medicine and Department of Medicine McGill University Montreal Canada