1. Department of Medicine and Surgery, Respiratory Disease and Lung Function Unit University of Parma Parma Italy
2. Pulmonary Pharmacology Unit Institute of Pharmaceutical Science, King's College London London UK
3. Unit of Pharmacology, Department of Experimental Medicine University of Campania “Luigi Vanvitelli” Naples Italy
4. Unit of Respiratory Medicine, Department of Experimental Medicine University of Rome “Tor Vergata” Rome Italy