About the Authors

Douglas S. Krakower

dkrakowe@bidmc.harvard.edu

Affiliations Harvard Medical School, Boston, Massachusetts, United States of America, Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America

Matthew J. Mimiaga

Affiliations Harvard Medical School, Boston, Massachusetts, United States of America, Department of Psychiatry, Massachusetts General Hospital, Boston, Massachusetts, United States of America, Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, United States of America, The Fenway Institute, Fenway Health, Boston, Massachusetts, United States of America

Joshua G. Rosenberger

Affiliation Department of Global and Community Health, George Mason University, Fairfax, Virginia, United States of America

David S. Novak

Affiliation OLB Research Institute, Online Buddies, Inc., Cambridge, Massachusetts, United States of America

Jennifer A. Mitty

Affiliations Harvard Medical School, Boston, Massachusetts, United States of America, Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America, The Fenway Institute, Fenway Health, Boston, Massachusetts, United States of America

Jaclyn M. White

Affiliation The Fenway Institute, Fenway Health, Boston, Massachusetts, United States of America

Kenneth H. Mayer

Affiliations Harvard Medical School, Boston, Massachusetts, United States of America, Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America, The Fenway Institute, Fenway Health, Boston, Massachusetts, United States of America

Competing Interests

Dr. Novak is an employee of Online Buddies, Inc. Dr. Rosenberger provides consulting services for Online Buddies, Inc. All authors have participated in research funded by an unrestricted grant for project support from Gilead Sciences. 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: DK MM JR DN JM KM. Performed the experiments: DK MM JR DN KM. Analyzed the data: DK MM JR DN JW KM. Contributed reagents/materials/analysis tools: DK MM JR DN JM KM. Wrote the paper: DK MM JR DN JM JW KM.