Keywords: Beclomethasone dipropionate/ formoterol fumarate/glycopyrronium bromide (BDP/FOR/GLY); Budesonide/formoterol fumarate/glycopyrronium bromide (BUD/FOR/GLY); Chronic obstructive pulmonary disease; Fluticasone furoate/formoterol fumarate/glycopyrronium bromide (FF/FOR/GLY); Fluticasone furoate/vilanterol/umeclidinium (FF/VIL/UMEC); Single-inhaler triple therapy.