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The current mainstream treatment for COPD is bronchodilators alone or in combination. The effects of a β 2 -agonist, tulobuterol, administered transdermally, have been reported to last for 24h. However, there are no reports on the efficacy of tulobuterol combined with an anticholinergic. In this study, we investigated the efficacy and safety of transdermal tulobuterol combined with inhaled...
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