Double-blind Randomized Parallel Group Study Comparing the Efficacy and Safety of Tiotropium and Ipratropium in the Treatment of COPD Patients in Taiwan

by Jeng-Yuan Hsu, Reury-Pemg Perng, Jau-Yeong Lu, Chin-Pyng Wu, Ming-Shyan Huang, Kwen-Tay Luh, Pan-Chyr Yang
Published 2006-01-01