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. 2012 May 2;7:109–118. doi: 10.2147/COPD.S28677

Figure 2.

Figure 2

Comparisons of endurance time and peak oxygen uptake (VO2) in constant-load cycle exercise between treatments with tiotropium and oxitropium.

Notes: *P = 0.007; #P = 0.031. Bars represent mean ± standard error.