Tiotropium reduced exacerbations but not rate of FEV_1 decline in patients with COPD using other respiratory medications

摘要: Source Citation Tashkin DP, Celli B, Senn S, et al. A 4-year trial of tiotropium in chronic obstructive pulmonary disease. N Engl J Med. 2008;359:1543-54. 18836213