Accepted for Publication: July 11, 2014.
Published Online: October 27, 2014. doi:10.1001/jamainternmed.2014.5416.
Study concept and design: All authors.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Tsui, Lum, Page.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Tsui, Evans, Page.
Obtained funding: Lum, Hahn, Page.
Administrative, technical, or material support: Tsui, Lum, Page.
Study supervision: Lum, Page.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by grant R01DA016017 and K23DA027367 from the National Institute on Drug Abuse, National Institutes of Health (NIH); by grant K24AA022586 from the National Institute on Alcohol and Alcoholism; by grant UL1 RR024131 from the NIH (Clinical and Translational Science Institute, University of California, San Francisco [UCSF]); and by grant P30 DK026743 from the NIH (UCSF Liver Center).
Role of the Funder/Sponsor: The funding sources had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Disclaimer: The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institute on Drug Abuse or the NIH.
Additional Information: This study is dedicated to the memory of Leslie Tobler, PhD, who dedicated herself to furthering expert laboratory research methods in the fields of viral hepatitis and many other blood-borne infections.
Additional Contributions: Michael P. Busch, MD, PhD, and Leslie Tobler, PhD, at Blood Systems Research Institute, San Francisco, California, provided ongoing laboratory expertise. Stephen Shiboski, PhD, at UCSF, provided statistical consultation. Marlene Lira, BA, at Boston University, Boston, Massachusetts, helped with manuscript preparation and submission. Alya Briceno, MPH, UCSF, provided leadership, and the UFO Study staff and volunteers contributed their dedicated research assistance and support. Mss Lira and Briceno were paid employees of the study. We acknowledge their dedication and work, often above and beyond the money they received. We thank the San Francisco Department of Public Health for their ongoing commitment to the health of the young people who participate; their contributions, including preventive vaccines and primary care for participants, is invaluable. We thank our community partners at the Housing and Urban Health Clinic, Homeless Youth Alliance, San Francisco Needle Exchange, and San Francisco AIDS Foundation. Without the participation of all the UFO Study enrollees, this research and the knowledge we gain to help prevent hepatitis C virus infection would not be possible.