Data analysis: Main effectiveness will be analyzed by comparing the improvement in 4 or more points in the SF-12 Mental Health area at 6, 12, 18 y 24 months post- intervention, between intervention and control group. Logistic regression will be used to adjust for prognostic factors. Confounding factors or factors that might alter the effect, recorder will be taken in account in this analysis. All statistical tests will be performed with intention to treat.