It is noteworthy that only studies reporting on chronic migraine conditions observed this trend, while all other included studies observed significantly lower oxytocin concentrations among patients with chronic pain relative to healthy controls.61,62,74 Though not reported in the article, Anderberg and Uvnäs-Moberg asserted that the difference between plasma oxytocin levels in female patients with fibromyalgia and healthy controls were not significantly different (P = 0.55)63; however, the distribution of basal oxytocin levels in patients was larger than that in healthy controls. Here, OXT is linked to fibromyalgia.