Valerio, G., P. Bracciale, and F. Valerio. “Evaluation of Inflammation by Level of Interleukin 4 in Exhaled Breath Condensate in Patients Affected by Bronchial Asthma Treated According to GINA Guidelines”. Chest Disease Reports, vol. 5, no. 1, Oct. 2011, p. e11, doi:10.4081/cdr.5.34.