Effective squaric acid dibutylester immunotherapy is associated with a reduction of skin infiltrating T‐helper (Th)1 and Th17 cells in alopecia areata patients. Issue 1 (12th December 2014) - Avitabile, Simona; Sordi, Donatella; Garcovich, Simone; Colonna, Laura; De Luca, Anastasia; Nasorri, Francesca; Mazzanti, Cinzia; Cavani, Andrea