To describe EEG and relationship between EEG and clinical features in patients with schizophrenia. To assess the frequency of allele and genotypic distribution of ZNF804A gene polymorphism rs1344706 and COMT gene polymorphism rs165599 in patients with schizophrenia. | Summary of PhD thesis in Medicine Research on features of electroencephalogram and some polymorphisms of COMT ZNF804A gene in patients with schizophrenia