1. Draper Scholar, 555 Technology Square, Cambridge, MA 02139, USA
2. Department of Mechanical Engineering, Boston University, 110 Cummington Mall, Boston, MA 02215, USA
3. Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, MA 02155, USA
4. Draper, 555 Technology Square, Cambridge, MA 02139, USA