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HD, HDL2 and control groups grey matter and white matter volumes. The estimated least-squares (LS) means from the regression are depicted in a three-way comparison of grey and white matter volume. Error bars denote the 95% confidence intervals for the mean. Significance was set at p < .008. Symbols denote significant differences: **: HD, HDL2 < Control; *: HDL2 < Control; $: HD, Control< HDL2. GM = grey matter, WM = white matter.
