About the Authors

Paul Bates
Department of Microbiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States of America

Corresponding Author

pbates@mail.med.upenn.edu

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LJC PB. Performed the experiments: LJC. Analyzed the data: LJC PB. Wrote the paper: LJC PB.