1060 sex with men. Journal of Acquired Immune Deﬁciency Syndromes, 42, 80–85. doi:10.1097/01.qai.0000196665.78497.f1. Gribble, J. N., Miller, H. G., Rogers, S. M., & Turner, C. F. (1999). Interview mode and measurement of sexual behaviors: Method- ological issues. Journal of Sex Research, 36, 16–24. Grov, C., DeBusk, J. A., Bimbi, D. S., Golub, S. A., Nanin, J. E., & Parsons, J. T. (2007). Barebacking, the Internet, and harm reduction: An intercept survey with gay and bisexual men in Los Angeles and New York City. AIDS and Behavior, 11, 527–536. doi:10.1007/s10461-007-9234-7. Kelly, J. A., Morin, S. F., Remien, R. H., Steward, W. T., Higgins, J. A., Seal, D. W., et al. (2009). Lessons learned about behavioral science and acute/early HIV Infection. The NIMH Multisite Acute HIV Infection Study: V. AIDS and Behavior. doi: 10.1007/s10461-009-9579-1. Kerndt, P. R., Dubrow, R., Aynalem, G., Mayer, K. H., Beckwith, C., Remien, R. H., et al. (2009). Strategies used in the detection of acute/early HIV infections. The NIMH Multisite Acute HIV Infection Study: I. AIDS and Behavior. doi:10.1007/s10461- 009-9580-8. Koopman, J. S., Jacquez, J. A., Welch, G. W., Simon, C. P., Foxman, B., Pollock, S. M., et al. (1997). The role of early HIV infection in the spread of HIV through populations. Journal of Acquired Immune Deﬁciency Syndromes and Human Retrovirology, 14, 249–258. Mao, L., Crawford, J. M., Hospers, H. J., Prestage, G. P., Grulich, A. E., Kaldor, J. M., et al. (2006). ‘Serosorting’ in casual anal sex of HIV-negative gay men is noteworthy and is increasing in Sydney, Australia. AIDS (London, England), 20, 1204–1206. doi:10.1097/01.aids.0000226964.17966.75. Metzger, D. S., Koblin, B., Turner, C., Navaline, H., Valenti, F., Holte, S., et al. (2000). Randomized controlled trial of audio computer-assisted self-interviewing: Utility and acceptability in longitudinal studies. HIVNET vaccine preparedness study pro- tocol team. American Journal of Epidemiology, 152, 99–106. doi:10.1093/aje/152.2.99. Osmond, D. H., Pollack, L. M., Paul, J. P., & Catania, J. A. (2007). Changes in prevalence of HIV infection and sexual risk behavior in men who have sex with men in San Francisco: 1997–2002. American Journal of Public Health, 97, 1677–1683. doi: 10.2105/AJPH.2005.062851. Panel on Antiretroviral Guidelines for Adults and Adolescents. (2008). Guidelines for the use of antiretroviral agents in HIV-1- infected adults and adolescents. Department of Health and Human Services. Retrieved January 30, 2009, from http://www. aidsinfo.nih.gov/ContentFiles/AdultandAdolescentGL.pdf. Parsons, J. T., Schrimshaw, E. W., Wolitski, R. J., Halkitis, P. N., Purcell, D. W., Hoff, C. C., et al. (2005). Sexual harm reduction practices of HIV-seropositive gay and bisexual men: Serosorting, strategic positioning, and withdrawal before ejaculation. AIDS, (London, England), 19(Suppl 1), S13–S25. Pilcher, C. D., Fiscus, S. A., Nguyen, T. Q., Foust, E., Wolf, L., Williams, D., et al. (2005). Detection of acute infections during HIV testing in North Carolina. The New England Journal of Medicine, 352, 1873–1883. doi:10.1056/NEJMoa042291. Pilcher, C. D., Tien, H. C., Eron, J. J. Jr., Vernazza, P. L., Leu, S. Y., Stewart, P. W., et al. (2004). Brief but efﬁcient: Acute HIV 123 AIDS Behav (2009) 13:1054–1060 infection and the sexual transmission of HIV. The Journal of Infectious Diseases, 189, 1785–1792. doi:10.1086/386333. Pinkerton, S. D. (2008). Acute HIV infection increases the dangers of serosorting. American Journal of Preventive Medicine, 35, 184. doi:10.1016/j.amepre.2008.04.012. Remien, R. H., Higgins, J. A., Correale, J., Bauermeister, J., Dubrow, R., Bradley, M., et al. (2009). Lack of understanding of acute HIV infection among newly-infected persons—Implications for prevention and public health. The NIMH Multisite Acute HIV Infection Study: II. AIDS and Behavior. doi:10.1007/s10461- 009-9581-7. Stekler, J., Collier, A. C., Holmes, K. K., & Golden, M. R. (2006). Primary HIV infection education: Knowledge and attitudes of HIV-negative men who have sex with men attending a public health sexually transmitted disease clinic. Journal of Acquired Immune Deﬁciency Syndromes, 42, 123–126. doi:10.1097/01.qai. 0000218357.82970.67. Suarez, T. P., Kelly, J. A., Pinkerton, S. D., Stevenson, Y. L., Hayat, M., Smith, M. D., et al. (2001). Inﬂuence of a partner’s HIV serostatus, use of highly active antiretroviral therapy, and viral load on perceptions of sexual risk behavior in a community sample of men who have sex with men. Journal of Acquired Immune Deﬁciency Syndromes, 28, 471–477. Suarez, T., & Miller, J. (2001). Negotiating risks in context: A perspective on unprotected anal intercourse and barebacking among men who have sex with men–Where do we go from here? Archives of Sexual Behavior, 30, 287–300. doi:10.1023/A:1002 700130455. Truong, H. M., Kellogg, T., Klausner, J. D., Katz, M. H., Dilley, J., Knapper, K., et al. (2006). Increases in sexually transmitted infections and sexual risk behaviour without a concurrent increase in HIV incidence among men who have sex with men in San Francisco: A suggestion of HIV serosorting? Sexually Transmitted Infections, 82, 461–466. doi:10.1136/sti.2006.019 950. Turner, C. F., Ku, L., Rogers, S. M., Lindberg, L. D., Pleck, J. H., & Sonenstein, F. L. (1998). Adolescent sexual behavior, drug use, and violence: Increased reporting with computer survey tech- nology. Science, 280, 867–873. doi:10.1126/science.280.5365. 867. Van de Ven, P., Kippax, S., Crawford, J., Rawstorne, P., Prestage, G., Grulich, A., et al. (2002). In a minority of gay men, sexual risk practice indicates strategic positioning for perceived risk reduc- tion rather than unbridled sex. AIDS Care, 14, 471–480. doi: 10.1080/09540120208629666. Wawer, M. J., Gray, R. H., Sewankambo, N. K., Serwadda, D., Li, X., Laeyendecker, O., et al. (2005). Rates of HIV-1 transmission per coital act, by stage of HIV-1 infection, in Rakai, Uganda. The Journal of Infectious Diseases, 191, 1403–1409. doi:10.1086/ 429411. Weinhardt, L. S., Carey, M. P., Johnson, B. T., & Bickham, N. L. (1999). Effects of HIV counseling and testing on sexual risk behavior: A meta-analytic review of published research, 1985– 1997. American Journal of Public Health, 89, 1397–1405. doi: 10.2105/AJPH.89.9.1397.