DOI:
10.1055/s-00000059
Pneumologie
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References
Aaron SD, Vandemheen KL, Fergusson D. et al.
Tiotropium in combination with placebo, salmeterol, or fluticasone-salmeterol for treatment of chronic obstructive pulmonary disease: a randomized trial.
Ann Intern Med 2007;
146: 545-555
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