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. 2011 Aug 17;12(6):629–638. doi: 10.1007/s10194-011-0377-6

Fig. 1.

Fig. 1

The figure summarizes the classification of non-fibromyalgic and fibromyalgic headache patients, according to the discriminating factor derived from the best separating variables (frequency of headache, self-rating anxiety scale, total tenderness score, sleep problems index, physical component summary)