To study the effect of twice daily dual bronchodilation (Aclidinium Bromide/Formoterol Fumarate 340/12 mcg) versus once daily single bronchodilation (Tiotropium 'respimat' 5 mcg) in patients with COPD on 24-hour static and dynamic hyperinflation, spirometry respiratory symptoms and sleep quality.
To study the effect of twice daily dual bronchodilation versus once daily single bronchodilation in patients with chronic obstructive pulmonary disease on 24-hour static and dynamic hyperinflation.