Lusuardi, M., Blasi, F., Terzano, C., Cricelli, C., Crispino, N., Comarella, L., De Benedetto, F., Sanguinetti, C., Allegra, L. and Donner, C. (2016) “Standards of care and clinical predictors in patients hospitalised for a COPD exacerbation - The Italian SOS (Stratification Observational Study)”, Monaldi Archives for Chest Disease, 71(4). doi: 10.4081/monaldi.2009.347.