Project RADAR was a 1-year study, in collaboration with the New York University School of Medicine, which examined the extent to which some gay men believed they were resistant to HIV infection, and whether these perceptions of resistance to HIV infection were concordant with individuals' histories of risks or immunologic characteristics.
Halkitis, P. N., Zade, D., Shrem, M., & Marmor, M. (2004). Beliefs about HIV noninfection and risky sexual behavior among MSM. AIDS Education & Prevention, 16(5), 448-458.
Thomas, S. M., Tse, D., Ketner, S. D., Rochford, G., Meyer, D. A., Zade, D. D., Halkitis, P. N., et al. (2006). CCR5 expression and duration of high risk sexual activity among HIV-seronegative men who have sex with men. AIDS, 20(14), 1979-1883.