1. Metaorganism Immunity Section, Laboratory of Host Immunity and Microbiome, National Institute of Allergy and Infectious Diseases, Bethesda, Maryland 20814, USA;
2. Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford OX3 7FY, United Kingdom
3. Microbiome Program, National Institute of Allergy and Infectious Diseases, Bethesda, Maryland 20892, USA