About the Authors
Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States of America
Department of Biomedical Sciences, Colorado State University, Fort Collins, Colorado, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: JIL GEP GAS. Performed the experiments: JIL PJS SBB ML. Analyzed the data: JIL PJS GEP. Contributed reagents/materials/analysis tools: JIL GEP. Wrote the paper: JIL GEP GAS.