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(A) Principal component analysis comparing gene expression from PPPP, PPP normal acral skin, normal non-acral skin and non-acral psoriasis vulgaris; PPP and cluster together PPPP. (B) Dendogram with unsupervised clustering of the expression profiles for all samples shows no clear distinction between PPP and PPPP as they appear in the same cluster. (C) There is a strong correlation between comparison of Fold Change (FCH) for PPP vs Normal acral skin and PPPP vs Normal acral skin.
