About the Authors

Katherine S Ralston

Affiliation Department of Microbiology, Immunology, and Molecular Genetics, University of California Los Angeles, Los Angeles, California, United States of America

Kent L Hill

To whom correspondence should be addressed. E-mail: kenthill@mednet.ucla.edu

Affiliations Department of Microbiology, Immunology, and Molecular Genetics, University of California Los Angeles, Los Angeles, California, United States of America , Molecular Biology Institute, University of California Los Angeles, Los Angeles, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

KSR and KLH conceived and designed the experiments, performed the experiments, analyzed the data, and wrote the paper.