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NCT00239499
NCT00239499
http://identifiers.org/clinicaltrials/NCT00239499
Pilot Study Comparing Tiotropium (Spiriva) to Salmeterol (Serevent) Plus Fluticasone (Flixotide) in Chronic Obstructive Pulmonary Disease (COPD) [clinicaltrials:NCT00239499]
identifiers.org URI
NCT00239499
http://identifiers.org/clinicaltrials/NCT00239499