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Scatterplot of the correlations between brain metabolites and psychological variables in patients with FM. FIQ, Fibromyalgia Impact Questionnaire; Glx, glutamate+glutamine; Glx-Cr, glutamate+glutamine/creatine; HADS-dep: Hospital Anxiety Depression Scale (depression subscale); Sphig, pain assessed with sphygmomanometer (the pressure that is needed to evoke pain). Blue circles represent patients with FM.
