output publications or other works EFFICACY ASSESSMENT OF ¿PASA LA VIDA¿: A SELECTIVE PREVENTION PROGRAM FOR CANNABIS ABUSE Conference Paper Mediation of an efficacious HIV risk reduction intervention for Spanish adolescents: The importance of knowledge on HIV and STIs Conference Poster Perceived barriers to condom use among adolescents from Spain: Implications for condom use Conference Paper Positive effects of implementing an HIV risk reduction intervention with the highest fidelity of implementation in schools. Conference Poster The HIV-related Attitudes Scale (HIV-AS): Factor structure and psychometric properties in Portuguese adolescents Conference Poster