1. Unit of Clinical and Molecular Epidemiology, IRCCS San Raffaele Pisana, Via di Valcannuta, 247, I-00166 Rome, Italy
2. Unit of Pulmonary Rehabilitation, IRCCS San Raffaele Pisana, Via della Pisana, 235, 00163 Rome, Italy
3. Scientific Direction, IRCCS San Raffaele Pisana Via di Valcannuta, 247, I-00166 Rome, Italy