1. Division of Infectious Diseases, Warren Alpert Medical School of Brown University, Rhode Island Hospital, Providence, RI 02903, USA
2. MIT Division of Health Sciences and Technology, Harvard Medical School, Boston, MA 02115, USA
3. Department of Entomology & Plant Pathology, Auburn University, Auburn, AL 36849, USA
4. Chemical Biology Program, Broad Institute of MIT & Harvard, Cambridge, MA 02142, USA
5. Department of Biological Engineering, Koch Institute for Integrative Cancer Research at MIT, Cambridge, MA 02139, USA
6. Atlas Venture, Cambridge MA 02139, USA