Fig. 4From: Single-inhaler fluticasone furoate/umeclidinium/vilanterol versus fluticasone furoate/vilanterol plus umeclidinium using two inhalers for chronic obstructive pulmonary disease: a randomized non-inferiority studyTime to first on-treatment moderate/severe exacerbation over the 24-week treatment period (ITT population)Back to article page