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Neuroendocrine studies have shown profound alterations in HPA-axis regulation in posttraumatic stress disorder (PTSD). Based on baseline assessments and the response to dexamethasone, a hypothalamic overdrive with enhanced glucocorticoid feedback inhibition has been suggested. The dexamethasone-corticotrophin releasing hormone (DEX-CRH) test has shown to be a more sensitive test to assess HPA-axis...