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Background: Beta 2 -adrenergic agonists are frequently used for the prevention and relief of bronchospasm in patients with reversible obstructive airway disease. Formoterol and salmeterol are long-acting beta 2 -agonists. In addition to its long duration of action, formoterol has been reported to have an onset of action similar to that of albuterol.Objective: This study compared the...
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