1. Harvard-MIT Division of Health Sciences & Technology, Cambridge, Massachusetts 02139, United States
2. Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
3. Synthetic Biology Group, Department of Electrical Engineering & Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
4. Laboratory of Nanomedicine and Biomaterials, Department of Anesthesiology, Brigham & Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States