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Tiotropium versus salmeterol for the prevention of exacerbations of COPD.
N Engl J Med. 2011 Mar 24;364(12):1093-1103. doi: 10.1056/NEJMoa1008378.
N Engl J Med. 2011.
PMID: 21428765
Free article.
Clinical Trial.
Roflumilast in moderate-to-severe chronic obstructive pulmonary disease treated with longacting bronchodilators: two randomised clinical trials.
Fabbri LM, Calverley PM, Izquierdo-Alonso JL, Bundschuh DS, Brose M, Martinez FJ, Rabe KF; M2-127 and M2-128 study groups.
Fabbri LM, et al.
Lancet. 2009 Aug 29;374(9691):695-703. doi: 10.1016/S0140-6736(09)61252-6.
Lancet. 2009.
PMID: 19716961
Clinical Trial.
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