1. Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padova, 35131 Padova, Italy
2. Department of Directional Hospital Management, University of Padova, 35131 Padova, Italy
3. Department of Medicine, University of Padova, 35131 Padova, Italy
4. Fisiopatologia Respiratoria, Ospedale-Università di Padova, Via Giustiniani, 2, 35128 Padova, Italy