The efficacy and safety of inhaled fluticasone propionate/salmeterol and ipratropium/albuterol for the treatment of chronic obstructive pulmonary disease: an eight-week, multicenter, randomized, double-blind, double-dummy, parallel-group study.
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R. Zuwallack | B. Make | N. Hanania | A. Emmett | C. Kalberg | K. Knobil | Christy P Brown