About the Authors

Elena S Lysenko

Affiliation Departments of Microbiology and Pediatrics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, United States of America

Adam J Ratner

Affiliation Departments of Microbiology and Pediatrics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, United States of America

Aaron L Nelson

Affiliation Departments of Microbiology and Pediatrics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, United States of America

Jeffrey N Weiser

To whom correspondence should be addressed. E-mail: weiser@mail.med.upenn.edu

Affiliation Departments of Microbiology and Pediatrics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

ESL, AJR, and JNW conceived and designed the experiments. ESL and ALN performed the experiments. ESL, AJR, ALN, and JNW analyzed the data. AJR and JNW wrote the paper.