1 Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts; MD-PhD Program, Boston University School of Medicine, Boston, Massachusetts.
2 Division of Gastroenterology and Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts; David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts.
3 Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts.
4 Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts.
5 David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts.
6 Massachusetts General Hospital Division of Senior Health and Harvard Medical School, Boston, Massachusetts; Department of Oncology, Cambridge Memorial Hospital, Cambridge, Ontario, Canada; Department of Oncology, Grand River Regional Cancer Center, Kitchener, Ontario, Canada.
7 Massachusetts General Hospital Division of Senior Health and Harvard Medical School, Boston, Massachusetts; Center for Geriatric Medicine, Cleveland Clinic, Cleveland, Ohio.
8 Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts; Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York; Division of Digestive and Liver Diseases, Columbia University Vagelos School of Medicine, New York, New York.
9 Division of Oncology, Massachusetts General Hospital Cancer Center and Harvard Medical School, Boston, Massachusetts.
10 Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts; Interventional Endoscopy Program, CentraCare and St. Cloud Hospital, St. Cloud, Minnesota.
11 Department of Pathology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts.
12 Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts; David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts; Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts.
13 Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts; Clinical and Translational Epidemiology Unit, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts. Electronic address: mgala@mgh.harvard.edu.