CCL17 and urticaria: The association between disease severity and levels of chemokines was analysed. Materials and Methods. Serums CCL11, CCL17, CCL26, and CCL27, D-dimer, C-reactive protein, and total IgE were measured in 51 patients with urticaria and in 25 healthy control subjects. Results. Serums CCL11, CCL17, CCL26, and CCL27 were significantly higher in patients with urticaria than in the healthy controls (P < 0.05).