About the Authors
- Sharon K. Kuss, Chris A. Etheredge, Julie K. Pfeiffer
- Department of Microbiology, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: JP. Performed the experiments: SK CE JP. Analyzed the data: SK CE JP. Wrote the paper: SK JP.