About the Authors
Michael G. DeGroote Institute for Infectious Disease Research and the Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario, Canada
The authors have declared that no competing interests exist.
Conceived and designed the experiments: AVCP SAR BKC. Performed the experiments: AVCP SAR CAC. Analyzed the data: AVCP SAR CAC BKC. Contributed reagents/materials/analysis tools: DTM. Wrote the paper: AVCP BKC.