1 Dept of Clinical and Experimental Medicine, Respiratory Disease and Lung Function Unit, University of Parma, Parma, Italy [email protected].
2 Respiratory Dept, Clinic Institute of Respiratory (ICR), Hospital Clinic of Barcelona - Institut d'Investigacions Biomèdiques Agusti Pi i Sunyer (IDIBAPS) - CIBERES - University of Barcelona (UB), Barcelona, Spain.
3 Dept of Clinical and Experimental Medicine, Respiratory Disease and Lung Function Unit, University of Parma, Parma, Italy.