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New models of interaction between genetic and environmental factors have been proposed to explain the pathogenesis of schizophrenia. The Val158Met polymorphism of the COMT (Catechol-O-Methyltransferase) gene, involved in dopamine regulation and related to negative symptoms, has been previously thought to interact with cannabis use in the modulation of risk of psychosis. The aim of the study was to...
Approximately 60% of patients with a first episode of psychosis will significantly reduce the severity of their positive symptomatology with antipsychotic drugs. The aim of this study was to investigate predictors of response to antipsychotic treatment during the first episode of non-affective psychosis. 172 patients (107 male) with a diagnosis of schizophreniform, schizophrenia, schizoaffective,...
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