Mausbach, B., Semple, S., Strathdee, S., Zians, J. y Patterson, T. (2007). Efficacy of a behavioral intervention for increasing safer sex behaviors in HIV-positive MSM methamphetamine users: Results from the EDGE study. Drug and Alcohol Dependence, 87(2-3), 249-257. https://doi.org/10.1016/j.drugalcdep.2006.08.026