About the Authors

Chu Kwen Ho

Affiliation Department of Microbiology, Columbia University College of Physicians & Surgeons, New York, New York, United States of America

Alicia F. Lam

Affiliation Department of Microbiology, Columbia University College of Physicians & Surgeons, New York, New York, United States of America

Lorraine S. Symington

lss5@columbia.edu

Affiliation Department of Microbiology, Columbia University College of Physicians & Surgeons, New York, New York, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CKH LS. Performed the experiments: CKH AFL. Analyzed the data: CKH AFL LS. Wrote the paper: CKH LS.