About the Authors

Susan S. Philip

Susan.Philip@sfdph.org

Affiliations San Francisco Department of Public Health, San Francisco, California, United States of America, University of California San Francisco, San Francisco, California, United States of America

Xuesong Yu

Affiliation Statistical Center for HIV/AIDS Research and Prevention, Seattle, Washington, United States of America

Deborah Donnell

Affiliation Statistical Center for HIV/AIDS Research and Prevention, Seattle, Washington, United States of America

Eric Vittinghoff

Affiliation University of California San Francisco, San Francisco, California, United States of America

Susan Buchbinder

Affiliations San Francisco Department of Public Health, San Francisco, California, United States of America, University of California San Francisco, San Francisco, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SP DD EV SB. Performed the experiments: XY DD EV. Analyzed the data: SP XY DD EV SB. Wrote the paper: SP DD EV SB. Literature review: SP.