CDH23 and major depressive disorder: The heterozygous variant rs1227051-G/A in the CDH23 gene was also found to be more frequent in the “schizophrenia-female” (p = 0.0190, n = 47) and “depression-female” (p = 0.0001, n = 60) groups, with a decrease in the incidence of the homozygous variant rs1227051-A compared to the group of healthy volunteers.