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Comparison between progressive and non-progressive groups for ratio of chondroitin sulphate and keratan sulphate epitopes to total sulphated glycosaminoglycans. The central solid line represents the median, with the box representing the middle 50% of the data. The error bar cap lines mark the 10th and 90th centiles. Dots represent individual data points outside the 10th and 90th centiles. The left hand y axis is used for 3B3/GAG and 5D4/GAG. The right hand y axis is used for 7D4/GAG.
