1. Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA.
2. Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA.
3. Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA.
4. Center for Genome Sciences and Systems Biology, Washington University School of Medicine, St. Louis, MO 63110, USA.
5. Center for Gut Microbiome and Nutrition Research, Washington University School of Medicine, St. Louis, MO 63110, USA.
6. Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, MO 63110, USA.