MIF and Psoriasiform dermatitis: Disease severity was equivalent in wild-type → wild-type and Mif−/− → wild-type chimera, but was decreased in wild-type → Mif−/− and Mif−/− → Mif−/− chimera when compared to the first two groups, indicating specifically that MIF derived from radioresistant cells aggravates psoriasiform dermatitis (Figures 5A–C).