1. Division of Hematology-Oncology; Division of Hemostasis and Thrombosis; Beth Israel Deaconess Medical Center; Harvard Medical School; Boston MA USA
2. Division of Hematology-Oncology; Beth Israel Deaconess Medical Center; Harvard Medical School; Boston MA USA
3. Thrombosis Program; Division of Hematology; Department of Medicine; University of Ottawa; Ottawa Ontario Canada