About the Authors

Helen S. Cohen

Affiliation Bobby R. Alford Department of Otolaryngology – Head and Neck Surgery, Baylor College of Medicine, Houston, Texas, United States of America

Christopher Cox

Affiliation Department of Epidemiology, Johns Hopkins University, Bloomberg School of Public Health, Baltimore, Maryland, United States of America

Gayle Springer

Affiliation Department of Epidemiology, Johns Hopkins University, Bloomberg School of Public Health, Baltimore, Maryland, United States of America

Howard J. Hoffman

Affiliation Epidemiology and Statistics Program, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, Maryland, United States of America

Mary A. Young

Affiliation Division of Infectious Diseases, Department of Medicine, Georgetown University Medical Center, Washington, D. C., United States of America

Joseph B. Margolick

Affiliation Department of Molecular Microbiology and Immunology, Johns Hopkins University, Bloomberg School of Public Health, Baltimore, Maryland, United States of America

Michael W. Plankey

mwp23@georgetown.edu

Affiliation Division of Infectious Diseases, Department of Medicine, Georgetown University Medical Center, Washington, D. C., United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HC CC GS HH MY JM MP. Performed the experiments: HC MY JM MP. Analyzed the data: HC CC GS HH MP. Contributed reagents/materials/analysis tools: HC HH MY JM MP. Wrote the paper: HC CC GS HH MY JM MP.