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To Confirm Equivalent Bronchodilator Efficacy of the Test Product Compared to the Reference Product

Condition:   AsthmaInterventions:   Drug: Budesonide/Formoterol Easyhaler 320/9 ug/inhalation 4 inh;   Drug: Budesonide/Formoterol Easyhaler 320/9 ug/inhalation 1 inh;   Drug: Symbicort Turbuhaler 320/9 ug/inhalation 4 inh;   Drug: Symbicort Turbuhaler 320/9 ug/inhalation 1inh;   Drug: Placebo Symbicort Turbuhaler 320/9…