Figure 2From: Small internal jugular veins with restricted outflow are associated with severe multiple sclerosis: a sonographer-blinded, case–control ultrasound study Total bilateral blood volume flow (BVF). Scatterplot of the total BVF (mL/min) relative to the mean BVF among A ) patients with MS and controls, p = 0.26; B ) CCSVI-positive and CCSVI-negative MS patients, p = 0.07.Back to article page