1. Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.
2. Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.
3. Center for Computational and Integrative Biology and Gastrointestinal Unit, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.
4. Broad Institute of Massachusetts Institute of Technology and Harvard University, Cambridge, MA 02142, USA.
5. Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
6. Benaroya Research Institute at Virginia Mason, Seattle, WA 98101, USA.