About the Authors

Caroline Schrodt

Affiliation Center for Infectious Diseases, the University of Texas School of Public Health, Houston, Texas, United States of America

Erin E. McHugh

Affiliation Center for Infectious Diseases, the University of Texas School of Public Health, Houston, Texas, United States of America

Mary Ann Gawinowicz

Affiliation Protein Core Facility, Columbia University College, New York, New York, United States of America

Herbert L. DuPont

Affiliations Center for Infectious Diseases, the University of Texas School of Public Health, Houston, Texas, United States of America, Internal Medicine Services, St. Luke’s Episcopal Hospital and Department of Medicine, Infectious Diseases Section, Baylor College of Medicine, Houston, Texas, United States of America

Eric L. Brown

eric.l.brown@uth.tmc.edu

Affiliation Center for Infectious Diseases, the University of Texas School of Public Health, Houston, Texas, United States of America

Competing Interests

The authors declare no conflict of interest regarding any of the work described. HLD has received honoraria for speaking and consulting fees from Salix Pharmaceuticals. This does not alter the authors’ adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: ELB. Performed the experiments: ELB CS MAG. Analyzed the data: ELB CS EM MAG HLD. Contributed reagents/materials/analysis tools: ELB. Co-wrote the manuscript: ELB CS EM MAG HLD.