About the Authors
- Deborah M Tobiason, H. Steven Seifert
- Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
The authors have declared that no competing interests exist.
DMT and HSS conceived and designed the experiments. DMT performed the experiments. DMT and HSS analyzed the data. DMT and HSS wrote the paper.