Efficacy of pulmonary rehabilitation in chronic respiratory failure (CRF) due to chronic obstructive pulmonary disease (COPD): The Maugeri Study.
Carone M, Patessio A, Ambrosino N, Baiardi P, Balbi B, Balzano G, Cuomo V, Donner CF, Fracchia C, Nava S, et al. Respir Med. 2007 Dec; 101(12):2447-53. Epub 2007 Aug 28.