Combination inhaled steroid and long-acting beta 2 -agonist in addition to tiotropium versus tiotropium or combination alone for chronic obstructive pulmonary disease: Cochrane systematic review

Combination inhaled steroid and long-acting beta 2 -agonist in addition to tiotropium versus tiotropium or combination alone for chronic obstructive pulmonary disease: Cochrane systematic review is a topic covered in the Cochrane Abstracts.

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