1 Division of Hematology, Yale University School of Medicine, New Haven, CT, USA.
2 Division of Hematology, University of California at San Francisco, San Francisco, CA, USA.
3 Division of Hematology and Blood Transfusion Service, Massachusetts General Hospital, Boston, MA, USA; Division of Hemostasis and Thrombosis, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA; Harvard Medical School, Boston, MA, USA. Electronic address: pbendapudi@partners.org.