By Bob Sullivan Chronic obstructive pulmonary disease affects approximately 32 million Americans, and it is the fourth leading cause of death in the United States. COPD includes a group of degenerative conditions that impair airflow through the lungs. Cigarette smoking is the most common cause of COPD, and chronic bronchitis and emphysema are the two main types [1]. COPD exacerbations are frequently ...
↧