IL17A and schizophrenia: The aim of our study was (1) to assess prospectively serum levels of IFN-γ, IL-4, and IL-17 representative of type-1, type-2, and type-17 cytokines and the regulatory cytokines TGF-β1 and BAFF in drug-free schizophrenia patients in the acute phase of the disease and after antipsychotic treatment and (2) to determine correlations between cytokine levels changes and clinical and psychopathological features.