1. Department of Anatomy, University of California, San Francisco, San Francisco, CA 94143, USA.
2. Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA.
3. Department of Pediatrics, University of California, San Francisco, San Francisco, CA 94143, USA.
4. Department of Pathology, University of New Mexico School of Medicine, MSC 10 5590, Albuquerque, NM 87131, USA.
5. Department of Pediatrics, University of New Mexico School of Medicine, MSC 10 5590, Albuquerque, NM 87131, USA.
6. Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
7. Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
8. Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
9. Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
10. Department of Immunology, University of California, San Francisco, San Francisco, CA 94143, USA.