About the Authors
Department of Microbiology, Immunology, & Molecular Genetics, University of Kentucky, Lexington, Kentucky, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: ENBG SEFD. Performed the experiments: ENBG GSJ TMM PDP ANH. Analyzed the data: ENBG TMM SEFD. Contributed reagents/materials/analysis tools: GSJ. Wrote the paper: ENBG SEFD.