Dreher - Figure 42
Noninvasive ventilation during walking in patients with severe COPD: A Randomised Cross-over Trial
References
[22]
Dreher M, Storre JH, Windisch W. Noninvasive ventilation during walking in patients with severe COPD: a randomised cross-over trial. Eur Respir J. 2007;29:930–936.