A Comparison of the Real-Life Clinical Effectiveness of the Leading Licensed ICS/LABA Combination Inhalers in the Treatment for COPD oleh Ming SWY, Haughney J, Ryan D, Small I, Lavorini F, Papi A, Singh D, Halpin DMG, Hurst JR, Patel S, Ochel M, Kocks J, Carter V, Hardjojo A, Price DB