Okafor, C. N., Cook, R. L., Chen, X., Surkan, P. J., Becker, J. T., Shoptaw, S., . . . Plankey, M. W. (2016). Prevalence and Correlates of Marijuana Use among HIV-Seropositive and Seronegative Men in the Multicenter AIDS Cohort Study (MACS), 1984–2013. Am J Drug Alcohol Abuse.

Okafor, Chukwuemeka N., Robert L. Cook, Xinguang Chen, Pamela J. Surkan, James T. Becker, Steve Shoptaw, Eileen Martin, and Michael W. Plankey. "Prevalence and Correlates of Marijuana Use Among HIV-Seropositive and Seronegative Men in the Multicenter AIDS Cohort Study (MACS), 1984–2013." Am J Drug Alcohol Abuse 2016.

Okafor, Chukwuemeka N., et al. "Prevalence and Correlates of Marijuana Use Among HIV-Seropositive and Seronegative Men in the Multicenter AIDS Cohort Study (MACS), 1984–2013." Am J Drug Alcohol Abuse 2016.