a 48-week, double blind, randomized, multinational, multicentre, 2-arm parallel group, reference treatment controlled clinical trial of fixed combination beclomethasone dipropionate plus formoterol fumarate versus formoterol in patients with severe chronic obstructive pulmonary disease
a 48-week, 2-arm parallel group, fixed combination beclomethasone dipropionate plus formoterol fumarate versus formoterol in patients with severe chronic obstructive pulmonary disease