About the Authors
Division of Microbiology and Immunology, Pathology Department, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: MAM JPN. Performed the experiments: JPN. Analyzed the data: MAM JPN. Contributed reagents/materials/analysis tools: MAM JPN. Wrote the paper: MAM JPN.