About the Authors

Madhulika Jain

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

Jeffery S Cox

To whom correspondence should be addressed. E-mail: jcox@itsa.ucsf.edu

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

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

MJ and JSC conceived and designed the experiments. MJ performed the experiments. MJ and JSC analyzed the data and wrote the paper.