"There are two types of Fibromyalgia: Primary Fibromyalgia and Secondary Fibromyalgia. The Causes of Primary Fibromyalgia are unknown. This is the most common type of Fibromyalgia. The causes of Secondary Fibromyalgia are identifiable and are usually the result of a car accident or some other type of trauma."

— Cristina Olvera, 5 Misconceptions of Fibromyalgia

(Source: factoidz.com)

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