1. Platelet Biogenesis, 65 Grove Street, Suite 303, Watertown, Massachusetts 02472, United States
2. Harriton High School, 600 North Ithan Avenue, Bryn Mawr, Pennsylvania 19010, United States
3. Department of Biochemistry and Biophysics, Perelman School of Medicine at the University of Pennsylvania, 3620 Hamilton Walk, Philadelphia, Pennsylvania 19104-6073, United States