DOI:
10.1055/s-00000011
DMW - Deutsche Medizinische Wochenschrift
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References
Decramer M, Celli B, Tashkin D. et al.
Clinical trial design considerations in assessing long-term functional impacts of tiotropium in COPD: the Uplift trial.
J COPD 2004; 1: 303-312
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