About the Authors
W. Harry Feinstone Department of Molecular Microbiology and Immunology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: GD LSG. Performed the experiments: ACB LSG SD YD JS JASN. Analyzed the data: ACB GD LSG. Contributed reagents/materials/analysis tools: GD. Wrote the paper: ACB GD LSG.