1. Koch Institute for Integrative Cancer Research; Massachusetts Institute of Technology; Cambridge MA 02139 USA
2. Department of Chemistry; Massachusetts Institute of Technology; Cambridge MA 02139 USA
3. Department of Chemical Engineering; Massachusetts Institute of Technology; Cambridge MA 02139 USA
4. Department of Biology; Massachusetts Institute of Technology; Cambridge MA 02139 USA
5. Shire Pharmaceuticals; Lexington MA 02421 USA
6. Institute for Medical Engineering and Science; Massachusetts Institute of Technology; Cambridge MA 02139 USA
7. Harvard-MIT Division of Health Science and Technology; Massachusetts Institute of Technology; Cambridge MA 02139 USA