This is a randomized, multi-center, double-blind, double-dummy, placebo-controlled, parallel-group study, evaluating the efficacy of mometasone furoate (MF) /formoterol fumarate (F)[MF/F] metered dose inhaler (MDI) versus MF for 26 weeks. Prior to the 26-week double-blind Treatment Period, subjects will receive open-label MF MDI 200 mcg twice daily (BID) for 2 to 3 weeks during the Run-in Period. Efficacy will be measured by The Area Under the Curve From 0 to 12 Hours [AUC](0-12 hours) of the Change From Baseline to the Week 12 Endpoint