About the Authors

M. Reuel Friedman

mrf9@pitt.edu

Affiliations Department of Infectious Diseases and Microbiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America, Center for Lesbian, Gay, Bisexual, and Transgender Health Research, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America

Chongyi Wei

Affiliation Department of Epidemiology and Biostatistics, School of Medicine, University of California San Francisco, San Francisco, California, United States of America

Mary Lou Klem

Affiliations Center for Lesbian, Gay, Bisexual, and Transgender Health Research, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America, Health Sciences Library System, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America

Anthony J. Silvestre

Affiliations Department of Infectious Diseases and Microbiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America, Center for Lesbian, Gay, Bisexual, and Transgender Health Research, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America

Nina Markovic

Affiliations Center for Lesbian, Gay, Bisexual, and Transgender Health Research, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America, School of Dental Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America

Ron Stall

Affiliations Center for Lesbian, Gay, Bisexual, and Transgender Health Research, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America, Department of Behavioral and Community Health Sciences, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MRF CW MLK NM RS AS. Performed the experiments: MRF CW MLK. Analyzed the data: MRF. Wrote the paper: MRF CW MLK RS AS NM.