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. 2011 Jun 16;4:465–476. doi: 10.2147/IJGM.S21053

Figure 5.

Figure 5

Mean VAS of headache from 5 days before (M-5 to M-1) to 5 days during menstruation (M1 to M5): (A) overall, (B) mild, (C) moderate, (D) moderate-to-severe.

Abbreviation: VAS, visual analog scale.