Betancourt-Ocampo, D., González-González, A., Cruz-Mejía, O., Fernández-Varela, H. y Solís-Torres, C. 2018. Risk behaviors in youth from Mexico City: a retrospective study. Drugs and Addictive Behavior (revista descontinuada). 3, 2 (jul. 2018), 167–181. DOI:https://doi.org/10.21501/24631779.2882.