About the Authors

Susan E. Murray

murrays@ohsu.edu

Affiliation Department of Molecular Microbiology and Immunology, Oregon Health & Science University, Portland, Oregon, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SEM. Performed the experiments: SEM. Analyzed the data: SEM. Wrote the manuscript: SEM.