Hoffman, K.A. et al. 2016. Barriers to implementing screening, brief intervention and referral to treatment for substance use in HIV-AIDS health services in Peru. Revista Peruana de Medicina Experimental y Salud Pública. 33, 3 (Jul. 2016), 432–7. DOI:https://doi.org/10.17843/rpmesp.2016.333.2293.