CCL17 and Alzheimer disease: On the other hand, in three of our studies the mean serum CCL17/TARC levels of DIHS/DRESS patients were found to be 31,259.63 ± 6374.92 [33], 34,997 ± 9581 [34], and 21,023 ± 17,040 pg/mL [36], respectively, demonstrating that the serum CCL17/TARC levels of patients with DIHS/DRESS are >10-fold greater than those of patients with other skin diseases, such as AD, BP, and MF.