Effect of Roflumilast on Pulmonary Function and Respiratory Symptoms in Patients With Chronic Obstructive Pulmonary Disease (COPD) (BY217/M2-110) [clinicaltrials:NCT00062582]

Effect of Roflumilast on Pulmonary Function and Respiratory Symptoms in Patients With Chronic Obstructive Pulmonary Disease (COPD) (BY217/M2-110) [clinicaltrials:NCT00062582]