Chronic Obstructive Pulmonary Disease (COPD) is a major cause of morbidity and mortality worldwide. By 2020, COPD is expected to be the fifth leading cause of disability and the third leading cause of
Chronic Obstructive Pulmonary Disease (COPD) is a major cause of morbidity and mortality worldwide. By 2020, COPD is expected to be the fifth leading cause of disability and the third leading cause of
