1. Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
2. The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
3. Faculty of Chemical Engineering, Technion—Israel Institute of Technology, Haifa 32000, Israel.
4. Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, 02114, USA.
5. Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
6. Division of Gastroenterology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.
7. Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
8. Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.