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Figure 1 | BMC Pharmacology and Toxicology

Figure 1

From: Melatonin analgesia is associated with improvement of the descending endogenous pain-modulating system in fibromyalgia: a phase II, randomized, double-dummy, controlled trial

Figure 1

Flow chart showing recruitment and progress through the study. FMS: fibromyalgia syndrome; FIQ: fibromyalgia impact questionnaire; PPT: pain pressure threshold; QST: quantitative sensory testing; SCID: Structured Clinical Interview for DSM-IV; pain VAS: visual analog scale of pain; major side effects (MJSE) (severe dizziness, vivid nightmares, crippling drowsiness, severe headache, behavioral changes, and pain worsening).

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