About the Authors

Marta-Louise Ackers

mda6@cdc.gov

Current address: Division of Global HIV/AIDS, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Affiliation Epidemiology Branch, Division of HIV/AIDS Prevention, National Center for HIV, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Alan E. Greenberg

Current address: Department of Epidemiology and Biostatistics, George Washington University School of Public Health and Health Services, Washington, D.C., United States of America

Affiliation Epidemiology Branch, Division of HIV/AIDS Prevention, National Center for HIV, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Carol Y. Lin

Current address: Statistics and Data Management Branch, Division of Sexually Transmitted Diseases Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Affiliations Epidemiology Branch, Division of HIV/AIDS Prevention, National Center for HIV, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America, Quantitative Science and Data Management Branch, Division of HIV/AIDS Prevention, National Center for HIV, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Bradford N. Bartholow

Current address: Division of Global HIV/AIDS, Centers for Disease Control and Prevention, Pretoria, South Africa

Affiliation Epidemiology Branch, Division of HIV/AIDS Prevention, National Center for HIV, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Adrian Hirsch Goodman

Current address: Clinical Nursing, Brisbane, California, United States of America

Affiliation VaxGen, Inc, Brisbane, California, United States of America

Michael Longhi

Current address: Division of Spine and Biologics, Medtronic Inc., San Francisco, California, United States of America

Affiliation VaxGen, Inc, Brisbane, California, United States of America

Marc Gurwith

Current address: PaxVax, Inc, Menlo Park, California, United States of America

Affiliation VaxGen, Inc, Brisbane, California, United States of America

Competing Interests

AG, ML, and MG were employed by VaxGen, Inc., at the time this study was conducted. CL was employed by Northrop-Grumman Corporation. There are no patents, products in development or marketed products to declare. This does not alter the authors' adherence to all the PLoS ONE policies on sharing data and materials, as detailed online in the guide for authors.

Author Contributions

Conceived and designed the experiments: MA AEG BB MG. Performed the experiments: AG ML MG. Analyzed the data: MA AEG CL BB. Contributed reagents/materials/analysis tools: MA AEG CL BB AHG ML MG. Wrote the paper: MA AEG CL BB AHG ML MG.