Division of Gastroenterology, Massachusetts General Hospital, Harvard Medical School, Massachusetts Institute of Technology, David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Harvard University - Brigham and Women's Hospital, David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Columbia University - Department of Medicine and Massachusetts Institute of Technology (MIT) - Department of Mechanical Engineering