About the Authors

Chana Palmer
Department of Genetics, Stanford University School of Medicine, Stanford, California, United States of America

Elisabeth M Bik, David A Relman
Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, California, United States of America

Daniel B DiGiulio, David A Relman
Department of Medicine, Stanford University School of Medicine, Stanford, California, United States of America

Daniel B DiGiulio, David A Relman
Veterans Affairs Palo Alto Health Care System, Palo Alto, California, United States of America

Patrick O Brown
Department of Biochemistry, Stanford University School of Medicine, Stanford, California, United States of America

Patrick O Brown
Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, California, United States of America

Corresponding Author

pbrown@pmgm.stanford.edu

Competing Interests

POB is an investigator of the Howard Hughes Medical Institute.

Author Contributions

CP, EMB, DBD, DAR, and POB conceived and designed the experiments and analyzed the data. CP, EMB, and DBD performed the experiments. CP, EMB, DBD, and POB wrote the paper.