Tiotropium Bromide Alone vs Tiotropium Bromide and Formoterol Fumarate in Subjects With COPD (Study P04272) (COMPLETED) [clinicaltrials:NCT00139932]

Tiotropium Bromide Alone vs Tiotropium Bromide and Formoterol Fumarate in Subjects With COPD (Study P04272) (COMPLETED) [clinicaltrials:NCT00139932]