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. 2014 Jul 4;13(3):154–159.

Figure 4.

Figure 4

Comparison of the genotypes according to the mean intensity of headaches before and after use of tricyclic antidepressants. Verbal Numerical Rating Scale* (VNRS*): 0 → no pain;  1-3 → mild pain; 4-6 → moderate pain; 7-10 → severe pain