1. Division of Hematology, Department of Medicine, Brigham and Women’s Hospital, Boston, MA;
2. Harvard Medical School, Boston, MA;
3. Platelet Biogenesis, Cambridge, MA;
4. Division of Hemostasis and Thrombosis, Beth Israel Deaconess Medical Center, Boston, MA; and
5. Vascular Biology Program, Department of Surgery, Children’s Hospital Boston, Boston, MA