Cited- "The fibromyalgia syndrome (FMS) is the most frequent cause of chronic, widespread pain, with estimates of world-wide prevalence ranging from 0.5 to 5.0%.1,2 FMS is second only to osteoarthritis (OA) as the most common diagnosis among patients seen in rheumatology offices, and it is diagnosed approximately 4 times more frequently in women than in men. There are presently no diagnostic tests for fibromyalgia."
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