FOXP3 and psoriasis: used tape stripping to induce the Koebner isomorphic response on normal skin of patients with psoriasis and found a significant decrease in the number of FoxP3+ Tregs in biopsies and an decreased number of apparent morphological contacts between tryptase+ MCs and FoxP3+ Tregs within 3–7 d in the Koebner-positive group (63).