Pulmonary Disease, Chronic Obstructive — Airway Limitation Study: Study In Primary Care Centers Of Chronic Bronchitis In Long-Term Cigarette Smokers Of At Least 40 Years Of Age With Symptoms Of Cough And Shortness Of Breath
Citation(s)
An Evaluation of the Prevalence of Airway Obstruction Consistent With Chronic Obstructive Pulmonary Disease (COPD) in Subjects With a History of Cigarette Smoking and Symptoms of Chronic Bronchitis in a Primary Care Setting