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Expression of K16, CD4, CD8, CD11c and CD1a in early-stage psoriatic lesions. Biopsies were taken from non-lesional skin (day0 NL) and from incipient psoriatic lesions at baseline (day0 L) and 1 (day7 L) and 2 (day14 L) weeks later. Cryostat sections were stained by means of immunohistochemistry for keratinocyte differentiation marker K16 (a–d) and for the presence of CD4 (e–h) and CD8 (i–l), CD11c (m–p) and CD1a (q–t). Positively stained cells are in red color
