Original Research

Efficacy and safety of combining olodaterol Respimat® and tiotropium HandiHaler® in patients with COPD: results of two randomized, double-blind, active-controlled studies

ZuWallack R, Allen L, Hernandez G, Ting N, Abrahams R

International Journal of Chronic Obstructive Pulmonary Disease 2014, 9:1133-1144

Published Date: 14 October 2014