1. Jill Roberts Institute for Research in Inflammatory Bowel Disease, Joan and Sanford I. Weill Department of Medicine, Gastroenterology Division, and Department of Microbiology and Immunology, Weill Cornell Medical College, Cornell University, New York, NY, USA.
2. Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
3. Division of Gastroenterology, Hepatology, and Nutrition, Children’s Hospital of Philadelphia, Philadelphia, PA, USA.
4. Medical Research Council, Centre for Immune Regulation, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK.
5. Department of Pathology and Immunology, University of Geneva Medical School, Geneva, Switzerland.
6. Center for Immunology, Department of Laboratory Medicine and Pathology, University of Minnesota, MN, USA.
7. Institut Pasteur, Microenvironment and Immunity Unit, Paris, France.
8. Philadelphia Veterans Affairs Medical Center, Philadelphia, PA, USA.
9. Departments of Medicine and Microbiology, University of Alabama at Birmingham, Birmingham, AL, USA.