About the Authors

Shelley N. Facente

Contributed equally to this work with: Shelley N. Facente, Christopher D. Pilcher

shelley@facenteconsulting.com

Affiliations Facente Consulting, San Francisco, California, United States of America, San Francisco General Hospital HIV/AIDS Division, University of California San Francisco, San Francisco, California, United States of America

Christopher D. Pilcher

Contributed equally to this work with: Shelley N. Facente, Christopher D. Pilcher

Affiliation San Francisco General Hospital HIV/AIDS Division, University of California San Francisco, San Francisco, California, United States of America

Wendy E. Hartogensis

Affiliation San Francisco General Hospital HIV/AIDS Division, University of California San Francisco, San Francisco, California, United States of America

Jeffrey D. Klausner

Affiliation San Francisco Department of Public Health, STD Prevention and Control, San Francisco, California, United States of America

Susan S. Philip

Affiliation San Francisco Department of Public Health, STD Prevention and Control, San Francisco, California, United States of America

Brian Louie

Affiliation San Francisco Department of Public Health Microbiology Laboratory, San Francisco, California, United States of America

Katerina A. Christopoulos

Affiliation San Francisco General Hospital HIV/AIDS Division, University of California San Francisco, San Francisco, California, United States of America

Teri Dowling

Affiliation HIV Prevention Section, San Francisco Department of Public Health, San Francisco, California, United States of America

Grant N. Colfax

Affiliation HIV Prevention Section, San Francisco Department of Public Health, San Francisco, California, United States of America

Competing Interests

Shelley N. Facente works as a consultant for Facente Consulting, in addition to affiliation with UCSF. 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: SF CP WH KC. Performed the experiments: SF CP WH. Analyzed the data: SF CP WH. Contributed reagents/materials/analysis tools: BL. Wrote the paper: SF CP WH. Oversaw provision of testing services that led to data analyzed for this manuscript: JK SP. Provided oversight of testing policies and protocols as well as data collection for data used in this analysis: TD GC.