Fig. 1From: Benefits of glycopyrrolate/formoterol fumarate metered dose inhaler (GFF MDI) in improving lung function and reducing exacerbations in patients with moderate-to-very severe COPD: a pooled analysis of the PINNACLE studiesPINNACLE-1, -2, and -4 study design. PINNACLE-1 also included an open-label tiotropium arm (not shown). FF, formoterol fumarate; GFF, glycopyrrolate/formoterol fumarate; GP, glycopyrrolate; MDI, metered dose inhalerBack to article page