Exertional dyspnoea in COPD: the clinical utility of cardiopulmonary exercise testing
Denis E. O'Donnell, Amany F. Elbehairy, Azmy Faisal, Katherine A. Webb, J. Alberto Neder, Donald A. Mahler
European Respiratory Review 2016 25: 333-347; DOI: 10.1183/16000617.0054-2016