“…Many studies of HIV infection that included injection drug users (IDUs), since 1991, have focused on whether injection or sexual risk factors, or both, were associated with HIV seroconversion, and have not included STDs Kral, Bluthenthal, Lorvick, & Gee, 2001;Longshore, Bluthenthal, & Stein, 2001). Others have examined risk factors among IDUs (Kral, Bluthenthal, Erringer, Lorvick, & Edlin, 1999;McFarland, Kellog, Dilley, & Katz, 1997;Dushay, Singer, Weeks, Rohena, & Gruber, 2001), and explored the relationship between self-reported sexual orientation and behavior among IDUs (Pathela et al, 2006;Washington et al, 2006).…”