RT Journal Article SR Electronic T1 Reliability of ventilatory parameters during cycle ergometry in multicentre trials in COPD JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society DO 10.1183/09031936.00168708 A1 D.E. O'Donnell A1 J. Travers A1 K.A. Webb A1 Z. He A1 Y-M. Lam A1 A. Hamilton A1 S. Kesten A1 F. Maltais A1 H. Magnussen YR 2009 UL http://erj.ersjournals.com/content/early/2009/03/12/09031936.00168708.abstract AB