OXT and major depressive disorder: The absence of association between psychiatric symptom scores and plasma oxytocin levels is inconsistent with previous studies reporting that plasma oxytocin levels negatively correlate with PANSS, especially prosocial, scores in 27 male and 23 female patients with schizophrenia58 and that plasma oxytocin levels negatively correlate with HAMD and State‐Anxiety Inventory scores in 25 patients with MDD.59