The effects of catechol‐O‐methyltransferase single nucleotide polymorphisms on positive and negative symptoms of schizophrenia: A systematic review and meta‐analysis. - Misir, Emre; Ozbek, Mutlu Muhammed; Halac, Eren; Turan, Serkan; Alkas, Gokce Elif; Ciray, Remzi Ogulcan; Ermis, Cagatay (PsyCh Journal, 2022)