About the Authors

Moria C. Chambers

Affiliation Department of Microbiology and Immunology, Stanford University, Stanford, California, United States of America

Karla L. Lightfield

Affiliation Department of Microbiology and Immunology, Stanford University, Stanford, California, United States of America

David S. Schneider

dschneider@stanford.edu

Affiliation Department of Microbiology and Immunology, Stanford University, Stanford, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MCC KLL DSS. Performed the experiments: MCC KLL. Analyzed the data: MCC KLL DSS. Contributed reagents/materials/analysis tools: MCC KLL. Wrote the paper: MCC KLL DSS.