Long-acting bronchodilation with once-daily dosing of tiotropium (Spiriva) in stable chronic obstructive pulmonary disease.
Am J Respir Crit Care Med. 2000 Apr;161(4 Pt 1):1136-42. doi: 10.1164/ajrccm.161.4.9903044.
Am J Respir Crit Care Med. 2000.
PMID: 10764302
Clinical Trial.