1. Geriatrics, Unit of Respiratory Pathophysiology, Campus Bio-Medico University and Teaching Hospital, Rome, Italy
2. Pulmonary Rehabilitation, IRCCS San Raffaele Pisana Scientific Institute, Rome, Italy
3. Research Unit, Nursing Science, Campus Bio-Medico di Roma University, Rome, Italy
4. Geriatric Unit, Maugeri Clinical Research Institute (IRCCS), Milan, Italy
5. Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy