COMT and schizophrenia: In various studies, only a few of them, such as DISC1 (Disrupted-In-Schizophrenia 1), COMT (Catechol-O-Methyltransferase), VMAT1 (Vesicular Monoamine Transporter 1) or NRG1 (Neuregulin 1), could be sufficiently confirmed as relevant for schizophrenia development [48,49,50,51].