ESR1 and schizophrenia: Additionally, there are many genes located on chromosomes that correlate with schizophrenia, for example, candidate genes of the dopamine system, catechol‐omethyltransferase gene in the human 22q11.2 area (Vevera et al., 2009), monoamine oxidase gene in the Xp11‐23∼11‐4 area (Manuck et al., 2000), and estrogen receptor α gene (Westberg et al., 2003).