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(A) Mean oxygen saturation in major retinal arteries in 4 quadrants (r = 0.18, p<0.01). (B) Mean oxygen saturation in major retinal veins in 4 quadrants (r = -0.06). (C) Mean arteriovenous (A-V) difference in mean oxygen saturation in 4 quadrants (r = 0.19, p<0.01).
