1. Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
2. Department of Chemical Engineering and Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
3. Division of Gastroenterology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA.
4. Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
5. Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, UK.
6. Global Research Technologies, Global Drug Discovery, and Device R&D, Novo Nordisk A/S, Måløv, Denmark.
7. Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
8. School of Electrical Engineering and Computer Science, Department of Micro and Nanosystems, KTH Royal Institute of Technology, Stockholm, Sweden.
9. Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.