1 The Warren Alpert Medical School of Brown University, Providence, RI, United States.
2 Department of Medicine, Hematology Service, Memorial Sloan Kettering Cancer Center, New York, NY, United States; Weill Cornell Medical College, New York, NY, United States.
3 Division of Hemostasis and Thrombosis, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA, United States.
4 New England Baptist Hospital, Boston, MA, United States.
5 Harvard Medical School, Boston, MA, United States; Division of Hematology and Hematologic Malignancies, Boston, MA, United States. Electronic address: rpatell@bidmc.harvard.edu.