Effects of indacaterol versus tiotropium on exercise tolerance in patients with moderate COPD: a pilot randomized crossover study
Danilo Cortozi Berton1, Álvaro Huber dos Santos2, Ivo Bohn Jr.2, Rodrigo Quevedo de Lima2, Vanderléia Breda2, Paulo José Zimermann Teixeira2,3,4
DOI: http://dx.doi.org/10.1590/S1806-37562015000000334