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CCL21 expression in Contact Dermatitis Immunohistochemistry for CCL21 in biopsies taken from: normal skin (Control ICD); skin challenged with 10 % aqueous sodium lauryl sulphate at 24 hours (Positive ICD); non-challenged skin (Control ACD); and skin challenged with 5% Nickel at 48 hours (Positive ACD). Insets shows the marked areas amplified in order to reveal the CCL21+ lymphatic vessels. 400 × (original magnifications).
