1. Chemical Biology and Therapeutics Science, Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142, United States
2. Divisions of Renal Medicine and Engineering, Brigham and Women’s Hospital, Boston, Massachusetts 02115, United States
3. Islet Cell and Regenerative Biology, Joslin Diabetes Center, Boston, Massachusetts 02215, United States
4. Harvard Stem Cell InstituteHarvard Medical School, Cambridge, Massachusetts 02138, United States
5. Chemical Biology Program, Harvard University, Cambridge, Massachusetts 02138, United States
6. Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States