1. Department of Pulmonology, Haematology and Oncology, Division of Pneumology and Allergology, High Speciality ‘A. Cardarelli’ Hospital, Naples, Italy
2. Postgraduate School of Respiratory Medicine, Department of Systems Medicine, University of Rome ‘Tor Vergata’, Rome, Italy
3. Department of Systems Medicine, University of Rome ‘Tor Vergata’, Rome, Italy