1. Division of Hematology, Department of Medicine, Brigham and Women’s Hospital, Boston, MA 02115
2. Deparment of Medicine and Department of Pediatrics, Harvard Medical School, Boston, MA 02115
3. Immune Disease Institute, Boston, MA 02115
4. Toronto Platelet Immunobiology Group, Keenan Research Centre, Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario M5B-1W8, Canada
5. Program in Molecular Medicine, University of Utah, Salt Lake City, UT 84112
6. Program in Cellular and Molecular Medicine, Children’s Hospital, Boston, MA 02115
7. Division of Hemostasis and Thrombosis, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA 02115
8. Vascular Biology Program, Department of Surgery, Children’s Hospital, Boston, MA 02115