1. Division of Gastroenterology, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
2. Department of Health Sciences and Technology, Eidgenössische Technische Hochschule Zürich, Universitätstrasse 2, 8092 Zürich, Switzerland
3. The David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
4. Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
5. Department of Bioengineering, Northeastern University, Boston, Massachusetts 02115, United States
6. Department of Cell/Cellular and Molecular Biology, Northeastern University, Boston, Massachusetts 02115, United States
7. Division of Comparative Medicine, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States