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. Author manuscript; available in PMC: 2020 Mar 1.
Published in final edited form as: Pain. 2019 Mar;160(3):569–578. doi: 10.1097/j.pain.0000000000001434

Figure 2.

Figure 2.

Chromatic electroretinographies (ERGs) recorded interictally in 46 migraine patients and 42 healthy controls. (A) Left panel: Standard light-adapted 30 Hz flickering ERG waveforms averaged (SEM) across patients and healthy controls. Right panel: Zoomed-in scale of the a- and b-waves per color of light. (B) Boxplots illustrating medians (thick horizontal white lines), interquartile ranges (25th–75th percentile; lower and upper box boundaries) and observations below and above the 25th and 75th percentiles (vertical lines) for a- and b-waves, for migraine patients and healthy controls. Significant differences between the two groups are depicted by asterisks.