Study to Assess the Efficacy and Safety of PT003, PT005, and PT001 in Subjects With Moderate to Very Severe COPD

A randomized, double-blind, chronic dosing (24 weeks), placebo-controlled, parallel group, multi-center study to assess the efficacy and safety of glycopyrronium and formoterol fumarate inhalation aerosol (GFF; PT003), formoterol fumarate inhalation aerosol (FF; PT005), and glycopyrronium inhalation aerosol (GP; PT001) in subjects with moderate to very severe COPD, compared with placebo.