Dunjić et al. [89] have demonstrated higher IL-6 and lower TNF-α level in patients with schizophrenia in both exacerbation and remission phase in comparison to healthy controls and the absence of significant correlation between the levels of cytokines and sex, age, BMI, smoking habits, antipsychotic medication, duration of treatment and duration of illness. This evidence concerns the gene TNF and schizophrenia.