About the Authors

Haijing Hu

Affiliation Bacterial Toxins and Therapeutics Section, Laboratory of Bacterial Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America

Stephen H. Leppla

sleppla@niaid.nih.gov

Affiliation Bacterial Toxins and Therapeutics Section, Laboratory of Bacterial Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HH SHL. Performed the experiments: HH. Analyzed the data: HH SHL. Contributed reagents/materials/analysis tools: SHL. Wrote the paper: HH SHL.