[1] MIT, Koch Inst Integrat Canc Res, 77 Massachusetts Ave, Cambridge, MA 02139 USA
[2] MIT, Dept Chem, Cambridge, MA 02139 USA
[3] MIT, Dept Chem Engn, Cambridge, MA 02139 USA
[4] MIT, Dept Biol, 77 Massachusetts Ave, Cambridge, MA 02139 USA
[5] Shire Pharmaceut, Lexington, MA 02421 USA
[6] MIT, Inst Med Engn & Sci, 77 Massachusetts Ave, Cambridge, MA 02139 USA
[7] MIT, Harvard Mit Div Hlth Sci & Technol, Cambridge, MA 02139 USA