1. Service de Pneumologie et Soins Intensifs, Hôpital Européen Georges Pompidou, Assistance Publique-Hôpitaux de Paris, 75015 Paris, France
2. Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padova, 35128 Padova, Italy
3. Geriatrics Clinic, SS Annunziata University-Hospital of Chieti, 66100 Chieti, Italy
4. Section of Respiratory Diseases, University of Padova, 35121 Padova, Italy