MAOA and mental disorder: Our findings suggest that either monoamine imbalance—associated with the presence of the 30-bp VNTR polymorphism in the MAO-A promoter region and the 44-bp VNTR polymorphism in the 5-HTT (SLC 6A4) promoter region—has no influence on the QoL of postmenopausal women, or the relationships between these polymorphisms, QoL, and personality traits were not observed because the study involved only healthy women (those with mental disorders were excluded).