About the Authors

Deborah M Tobiason

Affiliation Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America

H. Steven Seifert

To whom correspondence should be addressed. E-mail: h-seifert@northwestern.edu

Affiliation Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

DMT and HSS conceived and designed the experiments. DMT performed the experiments. DMT and HSS analyzed the data. DMT and HSS wrote the paper.