1 Department of Clinical and Biological Sciences, Rare Lung Disease Unit and Severe Asthma Centre, San Luigi Gonzaga University Hospital, University of Turin, Orbassano, Turin, TO, Italy.
2 Department of Veterinary Sciences, University of Turin, Grugliasco, Turin, TO, Italy.
3 Allergy Service, AOU San Luigi Gonzaga Hospital, Turin, TO, Italy.
4 Department of Pneumology and Laboratory of Cytoimmunopathology of the Heart and Lung, Istituti Clinici Scientifici Maugeri, IRCCS, Veruno, NO, Italy.