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An association between a catechol-O-methyltransferase (COMT) Val156Met (rs4680) polymorphism and schizophrenia has been reported in the literature, although no conclusive outcomes have been attained. The aim of this study was to evaluate the association of the COMT Val108/158Met polymorphism with schizophrenia in a systematic review and meta-analysis. We performed a keyword search on PubMed and EBSCO...
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