Table 1. Excluded studies with reasons.

Criteria
A patient meets the diagnostic criteria for Fibromyalgia if these three conditions are met:
Widespread pain index ≥7 and symptom severity scale score ≥5, or widespread pain index 3 to 6 and symptom severity scale score ≥9
The patient has been experiencing symptoms at a similar level for 3 months or longer
The patient does not have any other condition that would explain the pain

^*The symptom severity scale score is the sum of the severity of the three symptoms (fatigue, waking unrefreshed, cognitive symptoms) and the extent of the other symptoms in general. The score ranges between 0 and 12.